Nodejitsu App var app = express(); error

app.js

//Initialize the variables needed.
var express = require('express')
  , http = require('http');

var app = express();
var server = http.createServer(app);
var io = require('socket.io').listen(server);

server.listen(80);
io.set('log level',1); //I put a level one to avoid too many non-application logs.
console.log('Application Running on http://localhost:80');
app.configure(function(){

	//No use in layout views
	app.set('view options', {
	  layout: false
	});

	//Indicates the directory of public access
    app.use(express.static('public'));

});

//Setting the path and the view to show
app.get('/', function(req, res){
    res.render('index.jade', { 
    	pageTitle: 'drawMe'
    });
});

//Connection has been established
io.sockets.on('connection', function(socket) {

	/* When a user performs an action on the client, receives data from the particular stock and shipping to all other coordinates */

	socket.on('mousemove',function(e){
		//console.log('Drawing ...');
		//io.sockets.emit('down',e);
		socket.broadcast.emit('moving', e);
	});

/*	socket.on('closeLine',function(e){
		console.log('stroke Terminated');
		io.sockets.emit('up',e);
	});

	socket.on('draw',function(e){
		io.sockets.emit('move',e);
	});

	socket.on('clean',function(){
		console.log('Clean slate');
		io.sockets.emit('clean',true);
	});
*/
});