main.js
/**
* Simple express app to serve tutorial pages and services.
*/
var express = require('express'),
http = require('http'),
path = require('path');
var app = express();
app.set('port', process.env.PORT || 3000);
app.use(express.static(__dirname));
http.createServer(app).listen(app.get('port'), function() {
console.log('Express server listening on port ' + app.get('port'));
});