add dockerfiles

Dockerfile

@@ -0,0 +1,6 @@
+FROM node:hydrogen-alpine
+WORKDIR /app
+COPY . .
+RUN yarn install
+CMD ["node", "dev-server.js"]
+EXPOSE 4000

docker-compose.yml

@@ -0,0 +1,7 @@
+version: '3'
+
+services:
+  app:
+    build: ./
+    ports:
+      - 4000:4000