index.js

var bodyParser = require('body-parser'),
    express = require('express'),
    http = require('http'),
    sio = require('socket.io');

var app = express();
var server = http.createServer(app);
app.use(
    bodyParser.json(),
    express.static(__dirname+'/test-ui')
);

app.listen(3000);

var io = sio.listen(server);

io.sockets.on('connection', function(socket) {
    console.log( 'Someone connected' );
});