Update: build && server frontend

frontend/server.js

@@ -0,0 +1,13 @@
+const path = require('path');
+const express = require('express');
+const app = express();
+const port = process.env.PORT || 4200;
+
+app.use(express.static(__dirname + '/dist/frontend'));
+app.get('/*', function(req,res) {
+  res.sendFile(path.join(__dirname+ '/dist/frontend/index.html'));
+});
+
+app.listen(port, '0.0.0.0',() => {
+  console.log (`listening on port ${port}`);
+});