We build our binary first with one image as the builder image, then use `copy` to copy the binary from the builder to the final executable image like alphine.

an example Dockerfile likes:

  FROM golang:1.18.1-alpine as builder
  # RUN apk add, wget, etc, and build the binary

  FROM alpine
  # or FROM scratch
  COPY --from=builder builder/binary /binary

  ENTRYPOINT ["/binary"]