Add multistage builds #226

image/demo/multistage-builds/Dockerfile

@@ -1,12 +1,21 @@
 FROM golang:1.9-alpine
+
 RUN apk --no-cache add git
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 WORKDIR /go/src/github.com/go/helloworld/
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 RUN go get -d -v github.com/go-sql-driver/mysql
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 COPY app.go .
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 RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o app .
 
 FROM alpine:latest
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 RUN apk --no-cache add ca-certificates
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 WORKDIR /root/
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 COPY --from=0 /go/src/github.com/go/helloworld/app .
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 CMD ["./app"]