k8s: add frontend dockerfile + skaffold

Signed-off-by: Ahmet Alp Balkan <ahmetb@google.com>

src/frontend/Dockerfile

@@ -0,0 +1,24 @@
+FROM golang:1.10-alpine as builder
+RUN apk add --no-cache ca-certificates git
+WORKDIR /go/src/frontend
+COPY . .
+
+# download known dependencies
+RUN go get -d github.com/google/uuid \
+    github.com/gorilla/mux \
+    google.golang.org/grpc \
+    google.golang.org/grpc/codes \
+    google.golang.org/grpc/status
+
+# other dependencies might not have listed above
+RUN go get -d ./...
+RUN go build -o /frontend .
+
+FROM alpine as release
+RUN apk add --no-cache ca-certificates
+WORKDIR /frontend
+COPY --from=builder /frontend /frontend/server
+COPY ./templates ./templates
+COPY ./static ./static
+EXPOSE 8080
+ENTRYPOINT ["/frontend/server"]