Add first version of the frontend

As of now the only usable functionality is signin in/out and managing
authorized users, and even then there is much room for improvement.

Change-Id: Ib87fc6866f69113a230187710de8644b78391917
diff --git a/cmd/server/Dockerfile b/cmd/server/Dockerfile
new file mode 100644
index 0000000..55890a0
--- /dev/null
+++ b/cmd/server/Dockerfile
@@ -0,0 +1,26 @@
+FROM golang:latest as builder
+
+ENV CGO_ENABLED=0
+
+ENV GO111MODULE=on
+ENV GOPROXY=https://proxy.golang.org
+
+RUN mkdir /gocache
+ENV GOCACHE /gocache
+
+WORKDIR /go/src/gomodules.avm99963.com/twpt-server
+COPY go.mod /go/src/gomodules.avm99963.com/twpt-server/go.mod
+COPY go.sum /go/src/gomodules.avm99963.com/twpt-server/go.sum
+COPY cmd /go/src/gomodules.avm99963.com/twpt-server/cmd
+COPY internal /go/src/gomodules.avm99963.com/twpt-server/internal
+COPY api_proto /go/src/gomodules.avm99963.com/twpt-server/api_proto
+
+WORKDIR /go/src/gomodules.avm99963.com/twpt-server/cmd/server
+RUN go install gomodules.avm99963.com/twpt-server/cmd/server
+
+FROM alpine
+LABEL maintainer "me@avm99963.com"
+
+RUN apk add --no-cache tini
+COPY --from=builder /go/bin/server /
+ENTRYPOINT ["/sbin/tini", "--", "/server"]