var app = require('express')();
var server = require('http').Server(app);
var io = require('socket.io')(server);

server.listen(8080);
// WARNING: app.listen(80) will NOT work here!

app.get('/', function (req, res) {
  res.sendFile(__dirname + '/index.html')
});

io.on('connection', socket => {
  console.log("A Client Connected!", socket.id)
  socket.on("PING", data => {
    console.log(data)
    socket.emit("PONG", {payload: 'pong'})
  })
})