text: var express = require('express');//require express
  var app = express();//initialize express.
  
  app.set('port', process.env.PORT); //sets port property for entire app
  
  var server = app.listen(app.get('port'), function() {//app.get retrieves the port variable
      var port = server.address().port;//to extract the port number from the object.
      console.log("Magic happens on Port ..."+ port);
  });
  //console.log("Me first");//to make sure the app.listen is a 
  //asynchronous call.
  
  
  
  
  