Prepare app for heroku deployment

package.json

@@ -3,7 +3,8 @@
   "version": "1.0.0",
   "scripts": {
     "ng": "ng",
-    "start": "ng serve --port 4200",
+    "start:dev": "ng serve --port 4200",
+    "start": "node server.js",
     "build:dev": "ng build --dev",
     "build:prod": "ng build --prod --aot",
     "test": "ng test",
@@ -12,8 +13,8 @@
     "postinstall": "npm run build:prod"
   },
   "engines": {
-    "node": "^8.9.1",
-    "npm": "^5.5.1"
+    "node": "^8.9.4",
+    "npm": "^5.6.0"
   },
   "private": true,
   "dependencies": {
@@ -36,13 +37,15 @@
     "bootstrap-material-design": "0.5.10",
     "bootstrap-notify": "3.1.3",
     "core-js": "2.4.1",
+    "express": "^4.16.2",
     "jquery": "3.2.1",
     "moment": "2.18.1",
     "ng2-order-pipe": "^0.1.5",
     "ng2-search-filter": "^0.3.1",
     "ng2-tree": "2.0.0-alpha.10",
     "ngx-pagination": "^3.0.3",
     "rxjs": "5.1.0",
+    "typescript": "2.2.0",
     "typings": "^2.1.1",
     "zone.js": "0.8.4"
   },

server.js

@@ -0,0 +1,6 @@
+const express = require('express');
+const app = express();
+
+app.use(express.static(__dirname + '/dist'));
+
+app.listen(process.env.PORT || 8080);