EXAMPLE GO DOCKERFILE

# ======================
#  GO FIRST STAGE
# ======================

FROM golang:latest as download
WORKDIR /usr/src/app
USER ${USER}
COPY go.mod go.sum ./
COPY . ./
ENV GO111MODULE="on" \
  GOARCH="amd64" \
  GOCACHE="/${HOME}/.cache/go-build" \
  GOENV="/${HOME}/.config/go/env" \
  GOMODCACHE="/${HOME}/go/pkg/mod" \
  GOPATH="/${HOME}/go" \
  GOOS="linux" \
  GOTOOLDIR="/${HOME}/go/pkg/tool/linux_amd64" \
  GCCGO="gccgo" \
  CC="gcc" \
  CXX="g++" \
  CGO_ENABLED="0"
RUN apt-get autoclean \
  && apt-get autoremove \
  && apt-get clean \
  apt-get remove

# ======================
#  GO SECOND STAGE
# ======================

FROM download as utilities
RUN apt-get update \
  && apt-get install -y \
  build-essential \
  wget \
  unzip \
  make \
  vim \
  git

# ======================
#  GO THIRD STAGE
# ======================

FROM utilities as build
WORKDIR /usr/src/app
RUN go get -f -u -v -fix all \
  go build -o main
COPY --from=utilities .  /usr/src/app/

# ======================
# GO FINAL STAGE
# ======================

FROM alpine:latest
COPY --from=build /usr/src/app .
EXPOSE 3000
CMD ["./main"]