Update Dockerfile

Dockerfile

@@ -1,16 +1,32 @@
-FROM golang:1.10-alpine as go
+FROM golang:1.10-alpine as build
 
-WORKDIR /go/src/hello-world
+# args
+ARG version="1.0.0"
+ARG repo="github.com/productionwentdown/hello-world"
+
+# source
+WORKDIR $GOPATH/src/${repo}
 COPY . .
+
+# build
 ENV CGO_ENABLED=0
 ENV GOOS=linux
 ENV GOARCH=amd64
-RUN go build -ldflags '-extldflags "-static"' -o hello-world
+RUN go build -ldflags "-s -w" -o /hello-world
 
 
 FROM scratch
 
+ARG version
+
+# labels
+LABEL org.label-schema.vcs-url="https://github.com/productionwentdown/hello-world"
+LABEL org.label-schema.version=${version}
+LABEL org.label-schema.schema-version="1.0"
+
+# copy binary
+COPY --from=build /hello-world /hello-world
+
 EXPOSE 8080
-COPY --from=go /go/src/hello-world/hello-world hello-world
 
 ENTRYPOINT ["/hello-world"]