feat: dockerfile for node packages

Dockerfile

@@ -0,0 +1,14 @@
+FROM node:12-stretch
+# alpine may be smaller, but comes with a 10-15% perf hit
+
+COPY package.json /app/package.json
+COPY out/ /app/out/
+
+WORKDIR /app
+
+RUN yarn install --production
+RUN yarn global add file:$(pwd)
+ENV PATH="${PATH}:$(yarn global bin)"
+
+ENTRYPOINT [ "node", "/app/out/index.js" ]
+CMD [ "--help" ]