Express Applications throwing 500 on azure

The following code runs perfectly locally...

var express = require('express');
var app = express();

app.get('/', function (req, res) {
    res.send("Hello World");
});

var port = 8080;

app.listen(port, function () {
    console.log('Server started and is listening on port ' + port);
});

But when i deploy it to azure I get a 500 error. Here is my findings...

1. I have taken this advice
2. Have tried all possible combinations of server.js, app.js, directory structure etc.

The code is being deployed from a local git repo.