server.js

let express = require("express");
let app = express();

//var app = require('express')();
let http = require('http').createServer(app);
let io = require('socket.io')(http);





var port = process.env.PORT || 8080;

app.use(express.static(__dirname + '/public'));

app.get("/test", function (request, response) {
  var user_name = request.query.user_name;
  response.end("Hello " + user_name + "!");
});


//socket test
io.on('connection', (socket) => {
  console.log('a user connected');
  socket.on('disconnect', () => {
    console.log('user disconnected');
  });
  setInterval(()=>{
    socket.emit('number', parseInt(Math.random()*10));
  }, 1000);

});


http.listen(port,()=>{
  console.log("Listening on port ", port);
});

//this is only needed for Cloud foundry 
require("cf-deployment-tracker-client").track();