I'm using Go 1.13 and the community module proxy to build the binary and Alpine as a base image. It adds a user and group instead of running as root.

Dockerfile

Be sure to replace "cmd/server/server.go" with your main file.

FROM golang:1.13 as builder
WORKDIR /app

COPY . /app

RUN CGO_ENABLED=0 GOOS=linux GOPROXY=https://proxy.golang.org go build -o app cmd/server/server.go
FROM alpine:latest
mailcap adds mime detection and ca-certificates help with TLS (basic stuff)
RUN apk --no-cache add ca-certificates mailcap && addgroup -S app && adduser -S app -G app

USER app

WORKDIR /app

COPY --from=builder /app/app .

ENTRYPOINT [ “./app” ]

I hope this is helpful. I mostly blogged this to document it for myself.

Originally published by  Andri at  andri.dk

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