minimal docker image aprox 3mb

Dockerfile

@@ -1 +1,9 @@
-FROM golang:1.7.4-onbuild
+FROM golang:latest as builder
+WORKDIR /go/src/github.com/olebedev/socks5
+COPY . .
+RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -ldflags '-s' -o ./socks5 
+
+FROM scratch
+COPY --from=builder /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/ca-certificates.crt
+COPY --from=builder /go/src/github.com/olebedev/socks5/socks5 /
+ENTRYPOINT ["/socks5"]