Golang Dockerfile

Dockerfile

FROM golang:1.17-buster as builder
ARG upx_version=3.96

RUN apt-get update && apt-get install -y --no-install-recommends xz-utils && \
  curl -Ls https://github.com/upx/upx/releases/download/v${upx_version}/upx-${upx_version}-amd64_linux.tar.xz -o - | tar xvJf - -C /tmp && \
  cp /tmp/upx-${upx_version}-amd64_linux/upx /usr/local/bin/ && \
  chmod +x /usr/local/bin/upx && \
  apt-get remove -y xz-utils && \
  rm -rf /var/lib/apt/lists/*

WORKDIR /app

COPY go.* ./
RUN go mod download

COPY . ./

RUN CGO_ENABLED=0 GOARCH=amd64 GOOS=linux go build -o server -a -ldflags="-s -w" -installsuffix cgo

RUN upx --ultra-brute -qq server && \
upx -t server

FROM scratch
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
COPY --from=builder /app/server /app/server

WORKDIR /app
CMD ["./server"]