feat(close #9): Dockerfile & .dockerignore supports (#10)

Author: phatpham9

generators/app/templates/.dockerignore

@@ -0,0 +1,3 @@
+build
+node_modules
+Dockerfile

generators/app/templates/Dockerfile

@@ -0,0 +1,12 @@
+FROM node:<%= elementNodeVersion %>-alpine as builder
+WORKDIR /app
+COPY . .
+RUN yarn && yarn build && yarn purge && yarn --production
+
+FROM node:<%= elementNodeVersion %>-alpine
+RUN apk add --no-cache curl
+WORKDIR /app
+COPY --from=builder /app/build build
+COPY --from=builder /app/node_modules node_modules
+HEALTHCHECK --interval=30s --timeout=30s --retries=3 CMD curl --fail http://${HOST}:${PORT}/health || exit 1
+CMD ["node", "build/index.js"]