Node of Hello World tutorial

+var express = require('express');
+var app = express();
+app.get('/', function (req, res) {
+	    res.send('Hello World');
+})
+
+var server = app.listen(80, function () {
+	    var host = server.address().address
+	    var port = server.address().port
+	    console.log("Example app listening at http://%s:%s", host, port)
+})
+

+{
+  "name": "helloworld",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "express": "^4.15.2"
+  }
+}