FROM golang:1.12 as builder WORKDIR /go/src/github.com/fhmq/hmq COPY . . RUN CGO_ENABLED=0 go build -o hmq -a -ldflags '-extldflags "-static"' . FROM alpine:3.8 WORKDIR / COPY --from=builder /go/src/github.com/fhmq/hmq/hmq . EXPOSE 1883 CMD ["/hmq"]