server.js

var pub = __dirname + '/public';
var express = require('express'),
    io = require('socket.io');

//----------------------------------------------
// HTTP server
var http = express.createServer(
  express.staticProvider(pub)
);

//----------------------------------------------
// Socket server
var socket = io.listen(http); 

socket.on('connection', function(client){ 
  // new client is here! 
  client.send("welcome");
}); 


//----------------------------------------------
// Let's get it rolling!
http.listen(3000);