Mounted app working

mountedApp.js

var express = require('express');
var app = express.createServer();
    someApp = express.createServer();

someApp.get('/', function(req, res) {
    res.end('Reached / in someApp');
});

app.use('/foobar', someApp);

app.get('/', function(req, res) {
    res.end('Reached / in app');
});

app.listen(8080);