Add babel dependencies

.babelrc

+{
+  "presets": ["@babel/preset-env"]
+}

package.json

@@ -3,12 +3,18 @@
   "version": "0.0.0",
   "private": true,
   "scripts": {
-    "start": "node ./bin/www"
+    "start": "npm run dev",
+    "dev": "babel-node ./bin/www"
   },
   "dependencies": {
     "cookie-parser": "~1.4.3",
     "debug": "~2.6.9",
     "express": "~4.16.0",
     "morgan": "~1.9.0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.2.2",
+    "@babel/node": "^7.2.2",
+    "@babel/preset-env": "^7.3.1"
   }
 }