create new server instance

create server function

/* Create the new server:

Create server and pass it an anonymous function as the argument.
The reason for this is that the function will be
called whenever there is a new request to the webserver. The function is
directly attached to the new webservers (http_server) event listener for
the request event that is passed.

*/
http_server.createServer(
    
    /* The requestListener function:
       the two parameters are req (http.ServerRequest) and res (http.ServerResponse).
    */
    function (req, res){
    
        /* http.ServerResponse.writeHead:
           This method sends a response status code
           of 200, that all is well and good and provides the content type of
           the response, in this case, text.
       */
        res.writeHead(200, {'Content-Type' : 'text/plain'});
        
        /* http.ServerResponse.end:
           This method is used to confirm that the headers and response body
           has been sent, indicating that the communication has finished.
        */
        res.end('Hello World, from a little node! \n');
        
    /* http.Server.listen:
       This method that is appended to the createServer function is used to
       listen for incoming connection on the port that is specified in the
       first argument of the method call; 8214 in this example. The other
       parameter is the host name, a callback function can also be added as
       an additional parameter.
    */
}).listen(8124, "127.0.0.1");