Problem:
I have a trivial demo application which use requireJS. When require.min.js  script loads, it tries to load entry-point script. But, the Problem is that instead of localhost:8090/js/app.js it tries to load localhost:8090/js/app.app and fails.
Demo: You can see the whole app at GitHub.
=== Only if you don't like GutHub, here's my code ===
File structure
ProjectRoot
 |-server.js
 |-public/
    |-index.html
    |-js/
       |-app.js
       |-lib/
          |-require.min.js
          |-underscore.js
          |-backbone.js
          |-raphael.js
       |-app/
          |-..
server.js:
var express = require('express');
var app = express();
app.use('/', express.static(__dirname + '/public'));
app.listen(8090);
index.html:
<!DOCTYPE html>
<html>
  <body>
  </body>
  <script src="js/lib/require.min.js" data-main="js/app.js"></script>
</html>
app.js:
require.config({
    paths: {
        'jquery': 'lib/jquery',
        'raphael': 'lib/raphael'
    },
    shim: {
        'lib/underscore': {
            exports: '_'
        },
        'lib/backbone': {
            deps: ["lib/underscore", "jquery"],
            exports: 'Backbone'
        }
    }
});
 
    