added docker stuff

Dockerfile

@@ -0,0 +1,21 @@
+FROM node as jsbuild
+
+ADD . /app
+WORKDIR /app
+
+RUN make deps && make js
+
+FROM golang as gobuild
+
+ADD . /app
+WORKDIR /app
+
+RUN make go 
+
+
+FROM gcr.io/distroless/base-debian10
+
+COPY --from=gobuild /app/build/s3share /app/s3share
+COPY --from=jsbuild /app/build/public /app/public
+
+ENTRYPOINT [ "/app/s3share" ]