nodestarterapp_app.js

// Import the HTTP module by using the require() method.
// The require() method is available globally

const http = require('http');

// Since we have imported the HTTP module,
// we can use methods from that module.

// Call the createServer() method inorder to create a server.

// This method requires a function or an anonymous function.

// And that function requires two arguments,
// one is: request - of type incoming message,
// and other is: response - of type object.

// This http.createServer() method returns a server instance.
// So, let's store this into a constant with a name "server".

const server = http.createServer((request, response) => {
	
	// This will console.log() will only be triggered when we complete
	// setting up the node server, and a request is received by this
	// server.
	
	console.log(request);
});

// From the server const, let's call a method named listen().

// Listen() actually starts a process where Node.js will not immediately exit
// our script. But instead it will keep the process running to listen for
// incoming requests.

// The listen() method takes a couple of arguments.

// The first one is: port (Port number on which you want to listen. By default,
// it takes port 80. But in our local machine we need to assign one like 3000).

// The second is: hostname (By default it will take the name of the machine
// it is running on. For our local machine, it will take localhost).

// Let's allocate a port: 3000. This tells Node.js to listen to this port.
// example: http://localhost:3000

server.listen(3000);