// Diet Server
var server = require('diet')
var app = server()
app.listen(8000)

// Socket.io
var io = require('socket.io')(app.server) // <-- use app.server 

// Listen on websocket connection
io.on('connection', function(socket){
  console.log('a user connected');
});

// Now you can access socket.io from client side with:
// http://localhost:8000/socket.io/socket.io.js