jrtechs-GoogleTrendsGame/googletrendsgame/server/server.js

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

const port = 3000;

//Whenever someone connects this gets executed
io.on('connection', function(socket) {
    console.log('A user connected');

    //Whenever someone disconnects this piece of code executed
    socket.on('disconnect', function () {
        console.log('A user disconnected');
    });
});

http.listen(port, function() {
    console.log('listening on *:3000');
});