So I have a basic Express project set up and I'm using this github project, <https://github.com/andrew/node-sass>, to be able to use Sass on top of node. This is my `app.js` currently:

```
var io = require('socket.io'),
    express = require('express'),
    path = require('path'),
    routes = require('./routes'),
    jquery = require('jquery');

/**
* Create app
*/

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

/**
* Configure app
*/ 

app.configure(function(){ 
    app.set('port', 8080);
    app.set('views', __dirname + '/views');
    app.set('view engine', 'ejs');
    app.use(express.static(path.join(__dirname, 'public')));
});

```

What do I need to do to get Sass working and auto recompiling? I can't seem to find any useful info for Express servers specifically.