Add Dockerfile for server

build/docker/server/Dockerfile

@@ -0,0 +1,14 @@
+ARG GOLANG_TAG=1.13-alpine
+
+FROM golang:$GOLANG_TAG as build-stage
+RUN apk add --no-cache git ca-certificates && update-ca-certificates
+WORKDIR /src
+COPY . .
+RUN CGO_ENABLED=0 go install -ldflags "-s -w -X main.version=`git describe --long --dirty --always`" ./cmd/server/...
+
+FROM scratch
+COPY --from=build-stage /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
+COPY --from=build-stage /go/bin/server /usr/local/bin/
+USER 1000
+EXPOSE 8080/tcp
+ENTRYPOINT ["server"]