Go has built-in support that makes WASM (WebAssembly) simple and possible. Let’s attempt to use WASM for the first time. A few packages are needed before running this on your system.

Begin by creating a .dockerfile and installing Docker on your host machine:

FROM golang:1.14.3-alpine 
WORKDIR /app
COPY . . 
RUN apk add --no-cache git
RUN go get -u github.com/shurcooL/goexec
RUN cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" .
RUN GOOS=js GOARCH=wasm go build -o main.wasm
CMD ["goexec", "http.ListenAndServe(`:8080`, http.FileServer(http.Dir(`.`)))"]

Here, we have an  Alpine-based Go .dockerfile

This is a minimum-sized Docker image with Go already installed.

We will create a working directory called /app and then install git by using the command apk add with the argument --no-cache.

This will prepare our Alpine instance to allow for Git modules to be pulled in later in the process.

#webassembly #wasm #docker