socket.io 404 (Not Found)

Hey,

I'm trying to use angular-socket-io in my project that uses `grunt serve` command to run the `Gruntfile.js`. Here's what I have done:
1. Downloaded angular-socket-io and socket.io-client via bower
2. Added angular-socket-io and socket.io-client libraries in my `index.html` page
3. Added `btford.socket-io` in my `app.module` at `app.js` file
4. Added following code to my `Socket.js` file which is located in same folder than `app.js`:
`app.factory('Socket', function (socketFactory) {
return socketFactory();
});`

Yet I get following error:

`GET http://127.0.0.1:9000/socket.io/?EIO=3&transport=polling&t=1448710127650-0 404 (Not Found)`

Problem is very obvious. It simply can't find socket.io library. I have installed socket.io via npm. Is it somehow possible to tell angular-socket-io module the location of socket.io that was downloaded via npm?