Multi-Stage build for golang and react project

Dockerfile

# 1. using golang image to build server side code (echo.labstack.com)
FROM golang:1.8 as goBuilder
RUN go get -u github.com/golang/dep/cmd/dep
WORKDIR /go/src/goApp
# optimization for caching layers
COPY ["Gopkg.toml", "Gopkg.lock", "./"]
RUN dep ensure --vendor-only
# coping source file and compile
COPY ["*.go", "./"]
RUN go install

# 2. using node environment to build react project
FROM kkarczmarczyk/node-yarn as nodeBuilder
WORKDIR /webApp
# optimization for caching layers
COPY ["package.json", "yarn.lock", "./"]
RUN yarn install
# coping source file and compile
COPY ["src", "./src"]
COPY ["public", "./public"]
RUN yarn build 

# 3. final image with no dependency, just binaries
FROM alpine
# https://stackoverflow.com/questions/34729748/installed-go-binary-not-found-in-path-on-alpine-linux-docker/35613430#35613430
RUN mkdir /lib64 && ln -s /lib/libc.musl-x86_64.so.1 /lib64/ld-linux-x86-64.so.2 
WORKDIR /app
COPY --from=goBuilder /go/bin/goApp /app
COPY --from=nodeBuilder /webApp/build /app/build
ENTRYPOINT ./goApp