text: var app = require('express')();
  var http = require('http').Server(app);
  var io = require('socket.io')(http);
  
  app.get('/', function(req, res){
    res.sendFile(__dirname+'/index.html');
  });
  
  
  io.on('connection', function(socket){
    socket.on('chat message', function(msg) {
      io.emit('chat message', msg);
    })
  });
  
  // io.on('connection', function(socket){
  //   socket.broadcast.emit('hi');
  // });
  
  // io.emit('some event', { for: 'everyone' });
  
  http.listen(3000, function(){
    console.log('listening on *:3000');
  });
  