Minimal Size Golang Docker Image

Dockerfile

FROM golang:alpine as builder
COPY . .
RUN apk update && \
  apk upgrade && \
  apk add --no-cache ca-certificates && \
  apk add --update-cache tzdata && \
  update-ca-certificates
RUN echo "nobody:x:65534:65534:nobody:/:" > /etc_passwd
ENV GO111MODULE=on
ENV CGO_ENABLED=0
ENV GOOS=linux
ENV GOARCH=amd64
WORKDIR /build
RUN go mod download
RUN go build -a -ldflags '-s' -o /main .

FROM scratch
COPY --from=builder /etc_passwd /etc/passwd
COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
COPY --from=builder /usr/local/go/lib/time/zoneinfo.zip /
COPY --from=builder /main .
ENV ZONEINFO=/zoneinfo.zip
EXPOSE 8080
USER nobody
ENTRYPOINT ["./main"]