Convert app into node version with express.

package.json

@@ -4,15 +4,21 @@
   "description": "",
   "main": "index.js",
   "scripts": {
-    "start": "webpack --watch",
+    "start-front": "webpack --watch",
+    "start-back": "node src/back/app.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "author": "",
   "license": "ISC",
   "devDependencies": {
+    "nodemon": "^2.0.4",
     "uglifyjs-webpack-plugin": "^2.2.0",
     "webpack": "^4.41.2",
     "webpack-cli": "^3.3.10",
     "webpack-dev-server": "^3.9.0"
+  },
+  "dependencies": {
+    "express": "^4.17.1",
+    "mustache-express": "^1.3.0"
   }
 }