How to Build React Application using Docker vs NGINX

In this post, we will see the details and implementation of Build React Application using Docker vs NGINX. We will go through step by step with an example.

Example Project

This is a simple project which demonstrates serving static React application with NGINX and Docker. We have a simple app with a header, footer and with a message.

Here is the example project where you can clone and run on your machine

// clone the project
git clone https://github.com/bbachi/react-nginx-docker

// install and start the dependencies
npm install
npm start

// build the docker image
docker build -t react-ui .
// run the app
docker run -d --name reactui -p 80:80 react-ui

This is a simple React app that has the header, footer and some message on the dashboard. Here are the Header.js, Footer.js and, App.js files

import React from 'react';

const Header = () => {

    return (
        <div class="header">
            Simple React App
        </div>
    )
    
};

export default Header

Header.js

import React from 'react';

const Footer = () => {

    return (
        <div class="footer">
            2020
        </div>
    )
    
};

export default Footer

Footer.js

import React from 'react';
import Header from './header/header'
import Footer from './footer/footer'
import './App.css';

function App() {
  return (
    <div className="App">
      <Header />
      <div class="dashboard">
        <h1>Simple React App served by NGINX and Docker</h1>
      </div>
      <Footer />
    </div>
  );
}

export default App;

App.js

Just Enough NGINX For This Project

We are not going through everything about NGINX here and we just go through just enough for this project. If you are already familiar with this stuff, you can skip over to the next section.

NGINX processes are divided into one master process and several worker processes. The master process takes care of evaluating configuration and maintaining worker processes and the worker processes take care of actual requests. We can define the number of worker processes in the configuration file which can be placed in the directory /usr/local/etc/nginx, /etc/nginx or /usr/local/nginx/conf.

The configuration file consists of directives that form the modules or contexts. There are two kinds of directives: simple directives and block directives. A simple directive has names and parameters separated by a space and ends with a semicolon like this listen 80; . A block directive is the same but has additional information and surrounded by braces like this { listen 80; root /usr/share/nginx/html; }.

Let’s understand the NGINX configuration file that we used in this project. Below is the nginx.conf file which is located under folder .nginx at root location of the project.

Everything is a context in the configuration file. We have a hierarchical context that starts with the main context. For example, worker_processes and events are defined in the main context and another context starts with http. We have another context inside http called server which listens on port 80 and serving static assets from the root location /usr/share/nginx/html.

We can have multiple declarations of the server inside the http context and we can have multiple declarations of location inside the server context.

worker_processes 4;

events { worker_connections 1024; }

http {
    server {
        listen 80;
        root  /usr/share/nginx/html;
        include /etc/nginx/mime.types;

        location /appui {
            try_files $uri /index.html;
        }
    }
}

nginx.conf

Implementation

We use Docker as a container runtime for this project. We are using multi-stage builds to build the Docker image. Here is the Dockerfile for the project.

# stage1 as builder
FROM node:10-alpine as builder

# copy the package.json to install dependencies
COPY package.json package-lock.json ./

# Install the dependencies and make the folder
RUN npm install && mkdir /react-ui && mv ./node_modules ./react-ui

WORKDIR /react-ui

COPY . .

# Build the project and copy the files
RUN npm run build


FROM nginx:alpine

#!/bin/sh

COPY ./.nginx/nginx.conf /etc/nginx/nginx.conf

## Remove default nginx index page
RUN rm -rf /usr/share/nginx/html/*

# Copy from the stahg 1
COPY --from=builder /react-ui/build /usr/share/nginx/html

EXPOSE 3000 80

ENTRYPOINT ["nginx", "-g", "daemon off;"]

Dockerfile*\

Stage 1

We are using node:10-alpine as a base image for the stage1 and copying package.json to install all the dependencies. We then copy the remaining project later, in that way we can skip the installing dependencies every time there is a change in the files. Docker uses a cache to build the image from existing layers if there is no change.

We build the project with the react-scripts and all the built static files are placed in the /build folder.

Stage 2

Stage 2 starts with the base image nginx:alpine and copy the nginx.conf file, remove the index file from the root location, and finally, copy all the files from stage 1 to the root location where it can serve the content from.

Build the Image and Run the Project

Let’s build the project with this command docker build -t react-ui. and you can run the project with this command docker run -d --name reactui -p 80:80 react-ui . You can run the app on [http://localhost:80](http://localhost:80/appui)

Project running on localhost

Important Things to notice

The container port and nginx listen port should be the same which is 80 otherwise you would get ERR_EMPTY_RESPONSE when you run the project.

// container port
docker run -d --name react-ui -p 80:80 reactui

// nginx conf
http {   
   server {
      listen 80;
   }
}

We should include this directive in the nginx.conf file otherwise all the styles are rendered as plain text in the browser.

include /etc/nginx/mime.types;

Exec Into the Running Container

While the container is in running state we can exec into it and see the contents of the file system.

docker exec -it reactui /bin/sh

We can actually see all the contents under /usr/share/nginx/html

File system inside docker

Summary

• NGINX can be used as a web server or reverse proxy to serve the static content.
• All the NGINX configuration can be placed in this file nginx.conf .
• We need to build the react app and place all the static files in the root location of the NGINX to serve the web.
• Docker is used as the container runtime.
• We use multi-stage builds to reduce the final image size and remove unnecessary files from the production environment.
• Docker image can be built with docker build -t react-ui .
• Run the container with this command docker run -d --name reactui -p 80:80 react-ui.
• It’s very important to match ports while running the container and the listen port in nginx.conf file. Otherwise, you would get an ERR_EMPTY_RESPONSE error**.**
• You can exec into the container to explore the file system with this command docker exec -it reactui /bin/sh.

Conclusion

NGINX is a high-performance web server that serves content and application delivery, improves security, facilitates availability and scalability for the web apps. If you want to avoid or there is no need for building UI apps with Java or node js server runtime, you can build the UI app and serve the static files with the NGINX at scale. Thank you for reading!

#react #docker #javascript #nginx #development

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How native is React Native? | React Native vs Native App Development

If you are undertaking a mobile app development for your start-up or enterprise, you are likely wondering whether to use React Native. As a popular development framework, React Native helps you to develop near-native mobile apps. However, you are probably also wondering how close you can get to a native app by using React Native. How native is React Native?

In the article, we discuss the similarities between native mobile development and development using React Native. We also touch upon where they differ and how to bridge the gaps. Read on.

A brief introduction to React Native

Let’s briefly set the context first. We will briefly touch upon what React Native is and how it differs from earlier hybrid frameworks.

React Native is a popular JavaScript framework that Facebook has created. You can use this open-source framework to code natively rendering Android and iOS mobile apps. You can use it to develop web apps too.

Facebook has developed React Native based on React, its JavaScript library. The first release of React Native came in March 2015. At the time of writing this article, the latest stable release of React Native is 0.62.0, and it was released in March 2020.

Although relatively new, React Native has acquired a high degree of popularity. The “Stack Overflow Developer Survey 2019” report identifies it as the 8th most loved framework. Facebook, Walmart, and Bloomberg are some of the top companies that use React Native.

The popularity of React Native comes from its advantages. Some of its advantages are as follows:

• Performance: It delivers optimal performance.
• Cross-platform development: You can develop both Android and iOS apps with it. The reuse of code expedites development and reduces costs.
• UI design: React Native enables you to design simple and responsive UI for your mobile app.
• 3rd party plugins: This framework supports 3rd party plugins.
• Developer community: A vibrant community of developers support React Native.

Why React Native is fundamentally different from earlier hybrid frameworks

Are you wondering whether React Native is just another of those hybrid frameworks like Ionic or Cordova? It’s not! React Native is fundamentally different from these earlier hybrid frameworks.

React Native is very close to native. Consider the following aspects as described on the React Native website:

• Access to many native platforms features: The primitives of React Native render to native platform UI. This means that your React Native app will use many native platform APIs as native apps would do.
• Near-native user experience: React Native provides several native components, and these are platform agnostic.
• The ease of accessing native APIs: React Native uses a declarative UI paradigm. This enables React Native to interact easily with native platform APIs since React Native wraps existing native code.

Due to these factors, React Native offers many more advantages compared to those earlier hybrid frameworks. We now review them.

#android app #frontend #ios app #mobile app development #benefits of react native #is react native good for mobile app development #native vs #pros and cons of react native #react mobile development #react native development #react native experience #react native framework #react native ios vs android #react native pros and cons #react native vs android #react native vs native #react native vs native performance #react vs native #why react native #why use react native

Pdf2gerb: Perl Script Converts PDF Files to Gerber format

pdf2gerb

Perl script converts PDF files to Gerber format

Pdf2Gerb generates Gerber 274X photoplotting and Excellon drill files from PDFs of a PCB. Up to three PDFs are used: the top copper layer, the bottom copper layer (for 2-sided PCBs), and an optional silk screen layer. The PDFs can be created directly from any PDF drawing software, or a PDF print driver can be used to capture the Print output if the drawing software does not directly support output to PDF.

The general workflow is as follows:

1. Design the PCB using your favorite CAD or drawing software.
2. Print the top and bottom copper and top silk screen layers to a PDF file.
3. Run Pdf2Gerb on the PDFs to create Gerber and Excellon files.
4. Use a Gerber viewer to double-check the output against the original PCB design.
5. Make adjustments as needed.
6. Submit the files to a PCB manufacturer.

Please note that Pdf2Gerb does NOT perform DRC (Design Rule Checks), as these will vary according to individual PCB manufacturer conventions and capabilities. Also note that Pdf2Gerb is not perfect, so the output files must always be checked before submitting them. As of version 1.6, Pdf2Gerb supports most PCB elements, such as round and square pads, round holes, traces, SMD pads, ground planes, no-fill areas, and panelization. However, because it interprets the graphical output of a Print function, there are limitations in what it can recognize (or there may be bugs).

See docs/Pdf2Gerb.pdf for install/setup, config, usage, and other info.

---

pdf2gerb_cfg.pm

#Pdf2Gerb config settings:
#Put this file in same folder/directory as pdf2gerb.pl itself (global settings),
#or copy to another folder/directory with PDFs if you want PCB-specific settings.
#There is only one user of this file, so we don't need a custom package or namespace.
#NOTE: all constants defined in here will be added to main namespace.
#package pdf2gerb_cfg;

use strict; #trap undef vars (easier debug)
use warnings; #other useful info (easier debug)


##############################################################################################
#configurable settings:
#change values here instead of in main pfg2gerb.pl file

use constant WANT_COLORS => ($^O !~ m/Win/); #ANSI colors no worky on Windows? this must be set < first DebugPrint() call

#just a little warning; set realistic expectations:
#DebugPrint("${\(CYAN)}Pdf2Gerb.pl ${\(VERSION)}, $^O O/S\n${\(YELLOW)}${\(BOLD)}${\(ITALIC)}This is EXPERIMENTAL software.  \nGerber files MAY CONTAIN ERRORS.  Please CHECK them before fabrication!${\(RESET)}", 0); #if WANT_DEBUG

use constant METRIC => FALSE; #set to TRUE for metric units (only affect final numbers in output files, not internal arithmetic)
use constant APERTURE_LIMIT => 0; #34; #max #apertures to use; generate warnings if too many apertures are used (0 to not check)
use constant DRILL_FMT => '2.4'; #'2.3'; #'2.4' is the default for PCB fab; change to '2.3' for CNC

use constant WANT_DEBUG => 0; #10; #level of debug wanted; higher == more, lower == less, 0 == none
use constant GERBER_DEBUG => 0; #level of debug to include in Gerber file; DON'T USE FOR FABRICATION
use constant WANT_STREAMS => FALSE; #TRUE; #save decompressed streams to files (for debug)
use constant WANT_ALLINPUT => FALSE; #TRUE; #save entire input stream (for debug ONLY)

#DebugPrint(sprintf("${\(CYAN)}DEBUG: stdout %d, gerber %d, want streams? %d, all input? %d, O/S: $^O, Perl: $]${\(RESET)}\n", WANT_DEBUG, GERBER_DEBUG, WANT_STREAMS, WANT_ALLINPUT), 1);
#DebugPrint(sprintf("max int = %d, min int = %d\n", MAXINT, MININT), 1); 

#define standard trace and pad sizes to reduce scaling or PDF rendering errors:
#This avoids weird aperture settings and replaces them with more standardized values.
#(I'm not sure how photoplotters handle strange sizes).
#Fewer choices here gives more accurate mapping in the final Gerber files.
#units are in inches
use constant TOOL_SIZES => #add more as desired
(
#round or square pads (> 0) and drills (< 0):
    .010, -.001,  #tiny pads for SMD; dummy drill size (too small for practical use, but needed so StandardTool will use this entry)
    .031, -.014,  #used for vias
    .041, -.020,  #smallest non-filled plated hole
    .051, -.025,
    .056, -.029,  #useful for IC pins
    .070, -.033,
    .075, -.040,  #heavier leads
#    .090, -.043,  #NOTE: 600 dpi is not high enough resolution to reliably distinguish between .043" and .046", so choose 1 of the 2 here
    .100, -.046,
    .115, -.052,
    .130, -.061,
    .140, -.067,
    .150, -.079,
    .175, -.088,
    .190, -.093,
    .200, -.100,
    .220, -.110,
    .160, -.125,  #useful for mounting holes
#some additional pad sizes without holes (repeat a previous hole size if you just want the pad size):
    .090, -.040,  #want a .090 pad option, but use dummy hole size
    .065, -.040, #.065 x .065 rect pad
    .035, -.040, #.035 x .065 rect pad
#traces:
    .001,  #too thin for real traces; use only for board outlines
    .006,  #minimum real trace width; mainly used for text
    .008,  #mainly used for mid-sized text, not traces
    .010,  #minimum recommended trace width for low-current signals
    .012,
    .015,  #moderate low-voltage current
    .020,  #heavier trace for power, ground (even if a lighter one is adequate)
    .025,
    .030,  #heavy-current traces; be careful with these ones!
    .040,
    .050,
    .060,
    .080,
    .100,
    .120,
);
#Areas larger than the values below will be filled with parallel lines:
#This cuts down on the number of aperture sizes used.
#Set to 0 to always use an aperture or drill, regardless of size.
use constant { MAX_APERTURE => max((TOOL_SIZES)) + .004, MAX_DRILL => -min((TOOL_SIZES)) + .004 }; #max aperture and drill sizes (plus a little tolerance)
#DebugPrint(sprintf("using %d standard tool sizes: %s, max aper %.3f, max drill %.3f\n", scalar((TOOL_SIZES)), join(", ", (TOOL_SIZES)), MAX_APERTURE, MAX_DRILL), 1);

#NOTE: Compare the PDF to the original CAD file to check the accuracy of the PDF rendering and parsing!
#for example, the CAD software I used generated the following circles for holes:
#CAD hole size:   parsed PDF diameter:      error:
#  .014                .016                +.002
#  .020                .02267              +.00267
#  .025                .026                +.001
#  .029                .03167              +.00267
#  .033                .036                +.003
#  .040                .04267              +.00267
#This was usually ~ .002" - .003" too big compared to the hole as displayed in the CAD software.
#To compensate for PDF rendering errors (either during CAD Print function or PDF parsing logic), adjust the values below as needed.
#units are pixels; for example, a value of 2.4 at 600 dpi = .0004 inch, 2 at 600 dpi = .0033"
use constant
{
    HOLE_ADJUST => -0.004 * 600, #-2.6, #holes seemed to be slightly oversized (by .002" - .004"), so shrink them a little
    RNDPAD_ADJUST => -0.003 * 600, #-2, #-2.4, #round pads seemed to be slightly oversized, so shrink them a little
    SQRPAD_ADJUST => +0.001 * 600, #+.5, #square pads are sometimes too small by .00067, so bump them up a little
    RECTPAD_ADJUST => 0, #(pixels) rectangular pads seem to be okay? (not tested much)
    TRACE_ADJUST => 0, #(pixels) traces seemed to be okay?
    REDUCE_TOLERANCE => .001, #(inches) allow this much variation when reducing circles and rects
};

#Also, my CAD's Print function or the PDF print driver I used was a little off for circles, so define some additional adjustment values here:
#Values are added to X/Y coordinates; units are pixels; for example, a value of 1 at 600 dpi would be ~= .002 inch
use constant
{
    CIRCLE_ADJUST_MINX => 0,
    CIRCLE_ADJUST_MINY => -0.001 * 600, #-1, #circles were a little too high, so nudge them a little lower
    CIRCLE_ADJUST_MAXX => +0.001 * 600, #+1, #circles were a little too far to the left, so nudge them a little to the right
    CIRCLE_ADJUST_MAXY => 0,
    SUBST_CIRCLE_CLIPRECT => FALSE, #generate circle and substitute for clip rects (to compensate for the way some CAD software draws circles)
    WANT_CLIPRECT => TRUE, #FALSE, #AI doesn't need clip rect at all? should be on normally?
    RECT_COMPLETION => FALSE, #TRUE, #fill in 4th side of rect when 3 sides found
};

#allow .012 clearance around pads for solder mask:
#This value effectively adjusts pad sizes in the TOOL_SIZES list above (only for solder mask layers).
use constant SOLDER_MARGIN => +.012; #units are inches

#line join/cap styles:
use constant
{
    CAP_NONE => 0, #butt (none); line is exact length
    CAP_ROUND => 1, #round cap/join; line overhangs by a semi-circle at either end
    CAP_SQUARE => 2, #square cap/join; line overhangs by a half square on either end
    CAP_OVERRIDE => FALSE, #cap style overrides drawing logic
};
    
#number of elements in each shape type:
use constant
{
    RECT_SHAPELEN => 6, #x0, y0, x1, y1, count, "rect" (start, end corners)
    LINE_SHAPELEN => 6, #x0, y0, x1, y1, count, "line" (line seg)
    CURVE_SHAPELEN => 10, #xstart, ystart, x0, y0, x1, y1, xend, yend, count, "curve" (bezier 2 points)
    CIRCLE_SHAPELEN => 5, #x, y, 5, count, "circle" (center + radius)
};
#const my %SHAPELEN =
#Readonly my %SHAPELEN =>
our %SHAPELEN =
(
    rect => RECT_SHAPELEN,
    line => LINE_SHAPELEN,
    curve => CURVE_SHAPELEN,
    circle => CIRCLE_SHAPELEN,
);

#panelization:
#This will repeat the entire body the number of times indicated along the X or Y axes (files grow accordingly).
#Display elements that overhang PCB boundary can be squashed or left as-is (typically text or other silk screen markings).
#Set "overhangs" TRUE to allow overhangs, FALSE to truncate them.
#xpad and ypad allow margins to be added around outer edge of panelized PCB.
use constant PANELIZE => {'x' => 1, 'y' => 1, 'xpad' => 0, 'ypad' => 0, 'overhangs' => TRUE}; #number of times to repeat in X and Y directions

# Set this to 1 if you need TurboCAD support.
#$turboCAD = FALSE; #is this still needed as an option?

#CIRCAD pad generation uses an appropriate aperture, then moves it (stroke) "a little" - we use this to find pads and distinguish them from PCB holes. 
use constant PAD_STROKE => 0.3; #0.0005 * 600; #units are pixels
#convert very short traces to pads or holes:
use constant TRACE_MINLEN => .001; #units are inches
#use constant ALWAYS_XY => TRUE; #FALSE; #force XY even if X or Y doesn't change; NOTE: needs to be TRUE for all pads to show in FlatCAM and ViewPlot
use constant REMOVE_POLARITY => FALSE; #TRUE; #set to remove subtractive (negative) polarity; NOTE: must be FALSE for ground planes

#PDF uses "points", each point = 1/72 inch
#combined with a PDF scale factor of .12, this gives 600 dpi resolution (1/72 * .12 = 600 dpi)
use constant INCHES_PER_POINT => 1/72; #0.0138888889; #multiply point-size by this to get inches

# The precision used when computing a bezier curve. Higher numbers are more precise but slower (and generate larger files).
#$bezierPrecision = 100;
use constant BEZIER_PRECISION => 36; #100; #use const; reduced for faster rendering (mainly used for silk screen and thermal pads)

# Ground planes and silk screen or larger copper rectangles or circles are filled line-by-line using this resolution.
use constant FILL_WIDTH => .01; #fill at most 0.01 inch at a time

# The max number of characters to read into memory
use constant MAX_BYTES => 10 * M; #bumped up to 10 MB, use const

use constant DUP_DRILL1 => TRUE; #FALSE; #kludge: ViewPlot doesn't load drill files that are too small so duplicate first tool

my $runtime = time(); #Time::HiRes::gettimeofday(); #measure my execution time

print STDERR "Loaded config settings from '${\(__FILE__)}'.\n";
1; #last value must be truthful to indicate successful load


#############################################################################################
#junk/experiment:

#use Package::Constants;
#use Exporter qw(import); #https://perldoc.perl.org/Exporter.html

#my $caller = "pdf2gerb::";

#sub cfg
#{
#    my $proto = shift;
#    my $class = ref($proto) || $proto;
#    my $settings =
#    {
#        $WANT_DEBUG => 990, #10; #level of debug wanted; higher == more, lower == less, 0 == none
#    };
#    bless($settings, $class);
#    return $settings;
#}

#use constant HELLO => "hi there2"; #"main::HELLO" => "hi there";
#use constant GOODBYE => 14; #"main::GOODBYE" => 12;

#print STDERR "read cfg file\n";

#our @EXPORT_OK = Package::Constants->list(__PACKAGE__); #https://www.perlmonks.org/?node_id=1072691; NOTE: "_OK" skips short/common names

#print STDERR scalar(@EXPORT_OK) . " consts exported:\n";
#foreach(@EXPORT_OK) { print STDERR "$_\n"; }
#my $val = main::thing("xyz");
#print STDERR "caller gave me $val\n";
#foreach my $arg (@ARGV) { print STDERR "arg $arg\n"; }

---

Download Details:

Author: swannman
Source Code: https://github.com/swannman/pdf2gerb

License: GPL-3.0 license

#perl 

How to Build React Application using Docker vs NGINX

In this post, we will see the details and implementation of Build React Application using Docker vs NGINX. We will go through step by step with an example.

Example Project

This is a simple project which demonstrates serving static React application with NGINX and Docker. We have a simple app with a header, footer and with a message.

Here is the example project where you can clone and run on your machine

// clone the project
git clone https://github.com/bbachi/react-nginx-docker

// install and start the dependencies
npm install
npm start

// build the docker image
docker build -t react-ui .
// run the app
docker run -d --name reactui -p 80:80 react-ui

This is a simple React app that has the header, footer and some message on the dashboard. Here are the Header.js, Footer.js and, App.js files

import React from 'react';

const Header = () => {

    return (
        <div class="header">
            Simple React App
        </div>
    )
    
};

export default Header

Header.js

import React from 'react';

const Footer = () => {

    return (
        <div class="footer">
            2020
        </div>
    )
    
};

export default Footer

Footer.js

import React from 'react';
import Header from './header/header'
import Footer from './footer/footer'
import './App.css';

function App() {
  return (
    <div className="App">
      <Header />
      <div class="dashboard">
        <h1>Simple React App served by NGINX and Docker</h1>
      </div>
      <Footer />
    </div>
  );
}

export default App;

App.js

Just Enough NGINX For This Project

We are not going through everything about NGINX here and we just go through just enough for this project. If you are already familiar with this stuff, you can skip over to the next section.

NGINX processes are divided into one master process and several worker processes. The master process takes care of evaluating configuration and maintaining worker processes and the worker processes take care of actual requests. We can define the number of worker processes in the configuration file which can be placed in the directory /usr/local/etc/nginx, /etc/nginx or /usr/local/nginx/conf.

The configuration file consists of directives that form the modules or contexts. There are two kinds of directives: simple directives and block directives. A simple directive has names and parameters separated by a space and ends with a semicolon like this listen 80; . A block directive is the same but has additional information and surrounded by braces like this { listen 80; root /usr/share/nginx/html; }.

Let’s understand the NGINX configuration file that we used in this project. Below is the nginx.conf file which is located under folder .nginx at root location of the project.

Everything is a context in the configuration file. We have a hierarchical context that starts with the main context. For example, worker_processes and events are defined in the main context and another context starts with http. We have another context inside http called server which listens on port 80 and serving static assets from the root location /usr/share/nginx/html.

We can have multiple declarations of the server inside the http context and we can have multiple declarations of location inside the server context.

worker_processes 4;

events { worker_connections 1024; }

http {
    server {
        listen 80;
        root  /usr/share/nginx/html;
        include /etc/nginx/mime.types;

        location /appui {
            try_files $uri /index.html;
        }
    }
}

nginx.conf

Implementation

We use Docker as a container runtime for this project. We are using multi-stage builds to build the Docker image. Here is the Dockerfile for the project.

# stage1 as builder
FROM node:10-alpine as builder

# copy the package.json to install dependencies
COPY package.json package-lock.json ./

# Install the dependencies and make the folder
RUN npm install && mkdir /react-ui && mv ./node_modules ./react-ui

WORKDIR /react-ui

COPY . .

# Build the project and copy the files
RUN npm run build


FROM nginx:alpine

#!/bin/sh

COPY ./.nginx/nginx.conf /etc/nginx/nginx.conf

## Remove default nginx index page
RUN rm -rf /usr/share/nginx/html/*

# Copy from the stahg 1
COPY --from=builder /react-ui/build /usr/share/nginx/html

EXPOSE 3000 80

ENTRYPOINT ["nginx", "-g", "daemon off;"]

Dockerfile*\

Stage 1

We are using node:10-alpine as a base image for the stage1 and copying package.json to install all the dependencies. We then copy the remaining project later, in that way we can skip the installing dependencies every time there is a change in the files. Docker uses a cache to build the image from existing layers if there is no change.

We build the project with the react-scripts and all the built static files are placed in the /build folder.

Stage 2

Stage 2 starts with the base image nginx:alpine and copy the nginx.conf file, remove the index file from the root location, and finally, copy all the files from stage 1 to the root location where it can serve the content from.

Build the Image and Run the Project

Let’s build the project with this command docker build -t react-ui. and you can run the project with this command docker run -d --name reactui -p 80:80 react-ui . You can run the app on [http://localhost:80](http://localhost:80/appui)

Project running on localhost

Important Things to notice

The container port and nginx listen port should be the same which is 80 otherwise you would get ERR_EMPTY_RESPONSE when you run the project.

// container port
docker run -d --name react-ui -p 80:80 reactui

// nginx conf
http {   
   server {
      listen 80;
   }
}

We should include this directive in the nginx.conf file otherwise all the styles are rendered as plain text in the browser.

include /etc/nginx/mime.types;

Exec Into the Running Container

While the container is in running state we can exec into it and see the contents of the file system.

docker exec -it reactui /bin/sh

We can actually see all the contents under /usr/share/nginx/html

File system inside docker

Summary

• NGINX can be used as a web server or reverse proxy to serve the static content.
• All the NGINX configuration can be placed in this file nginx.conf .
• We need to build the react app and place all the static files in the root location of the NGINX to serve the web.
• Docker is used as the container runtime.
• We use multi-stage builds to reduce the final image size and remove unnecessary files from the production environment.
• Docker image can be built with docker build -t react-ui .
• Run the container with this command docker run -d --name reactui -p 80:80 react-ui.
• It’s very important to match ports while running the container and the listen port in nginx.conf file. Otherwise, you would get an ERR_EMPTY_RESPONSE error**.**
• You can exec into the container to explore the file system with this command docker exec -it reactui /bin/sh.

Conclusion

NGINX is a high-performance web server that serves content and application delivery, improves security, facilitates availability and scalability for the web apps. If you want to avoid or there is no need for building UI apps with Java or node js server runtime, you can build the UI app and serve the static files with the NGINX at scale. Thank you for reading!

#react #docker #javascript #nginx #development

React Starter Kit: Build Web Apps with React, Relay and GraphQL.

React Starter Kit — "isomorphic" web app boilerplate   

React Starter Kit is an opinionated boilerplate for web development built on top of Node.js, Express, GraphQL and React, containing modern web development tools such as Webpack, Babel and Browsersync. Helping you to stay productive following the best practices. A solid starting point for both professionals and newcomers to the industry.

See getting started guide, demo, docs, roadmap  |  Join #react-starter-kit chat room on Gitter  |  Visit our sponsors:

 

Hiring

Getting Started

• Follow the getting started guide to download and run the project (Node.js >= 8.16.2)
• Check the code recipes used in this boilerplate, or share yours

Customization

The master branch of React Starter Kit doesn't include a Flux implementation or any other advanced integrations. Nevertheless, we have some integrations available to you in feature branches that you can use either as a reference or merge into your project:

• feature/redux (PR) — isomorphic Redux by Pavel Lang (see how to integrate Redux) (based on master)
• feature/apollo (PR) — isomorphic Apollo Client by Pavel Lang (see Tracking PR #1147) (based on feature/redux)
• feature/react-intl (PR) — isomorphic Redux and React Intl by Pavel Lang (see how to integrate React Intl) (based on feature/apollo)
• feature/apollo-pure (PR) — Apollo devtools and TypeScript integration by piglovesyou (based on master)

You can see status of most reasonable merge combination as PRs labeled as TRACKING

If you think that any of these features should be on master, or vice versa, some features should removed from the master branch, please let us know. We love your feedback!

Comparison

	React Starter Kit	React Static Boilerplate	ASP.NET Core Starter Kit
App type	Isomorphic (universal)	Single-page application	Single-page application
Frontend
Language	JavaScript (ES2015+, JSX)	JavaScript (ES2015+, JSX)	JavaScript (ES2015+, JSX)
Libraries	React, History, Universal Router	React, History, Redux	React, History, Redux
Routes	Imperative (functional)	Declarative	Declarative, cross-stack
Backend
Language	JavaScript (ES2015+, JSX)	n/a	C#, F#
Libraries	Node.js, Express, Sequelize, GraphQL	n/a	ASP.NET Core, EF Core, ASP.NET Identity
SSR	Yes	n/a	n/a
Data API	GraphQL	n/a	Web API

Backers

♥ React Starter Kit? Help us keep it alive by donating funds to cover project expenses via OpenCollective or Bountysource!

 

How to Contribute

Anyone and everyone is welcome to contribute to this project. The best way to start is by checking our open issues, submit a new issue or feature request, participate in discussions, upvote or downvote the issues you like or dislike, send pull requests.

Learn More

• Getting Started with React.js
• Getting Started with GraphQL and Relay
• React.js Questions on StackOverflow
• React.js Discussion Board
• Flux Architecture for Building User Interfaces
• Enzyme — JavaScript Testing utilities for React
• Flow — A static type checker for JavaScript
• The Future of React
• Learn ES6, ES6 Features

Related Projects

• GraphQL Starter Kit — Boilerplate for building data APIs with Node.js, JavaScript (via Babel) and GraphQL
• Membership Database — SQL schema boilerplate for user accounts, profiles, roles, and auth claims
• Babel Starter Kit — Boilerplate for authoring JavaScript/React.js libraries

Support

• #react-starter-kit on Stack Overflow — Questions and answers
• #react-starter-kit on Gitter — Watch announcements, share ideas and feedback
• GitHub issues, or Scrum board — File issues, send feature requests
• appear.in/react — Open hours! Exchange ideas and experiences (React, GraphQL, startups and pet projects)
• @koistya on Codementor, or Skype — Private consulting

License

Copyright © 2014-present Kriasoft, LLC. This source code is licensed under the MIT license found in the LICENSE.txt file. The documentation to the project is licensed under the CC BY-SA 4.0 license.

---

Author: kriasoft
Source Code: https://github.com/kriasoft/react-starter-kit
License: MIT License

#graphql #react 

What are hooks in React JS? - INFO AT ONE

In this article, you will learn what are hooks in React JS? and when to use react hooks? React JS is developed by Facebook in the year 2013. There are many students and the new developers who have confusion between react and hooks in react. Well, it is not different, react is a programming language and hooks is a function which is used in react programming language.
Read More:- https://infoatone.com/what-are-hooks-in-react-js/

#react #hooks in react #react hooks example #react js projects for beginners #what are hooks in react js? #when to use react hooks