Perform a multi-stage build

[refs #922d4d13e11d]

Author: jfahrer

developing/hello-world-compiled/Dockerfile

@@ -1,9 +1,13 @@
-FROM golang:1.9.2-alpine
+FROM golang:1.9.2-alpine as builder
 
 WORKDIR /go/src/app
 
 COPY hello-world.go .
 
 RUN go build hello-world.go
 
-CMD ./hello-world
+FROM alpine:3.6
+
+COPY --from=builder /go/src/app/hello-world /
+
+CMD /hello-world

developing/hello-world-compiled/docker-compose.yml

@@ -2,9 +2,8 @@ version: '3.3'
 
 services:
   app:
-    image: hello-world:golang
+    image: jfahrer/hello-world:golang
     build:
       context: .
     volumes:
       - .:/go/src/app
-    command: sh -c "go build hello-world.go && ./hello-world"