JS: create simple node.js server

server.js

var http = require('http');
http.createServer( function( req, res ) {
    res.writeHead( 200, { 'Content-Type' : 'text/plain' } );
    res.end( 'Hello World\n' );
} ).listen( 1337, '127.0.0.1' );
console.log( 'Server running at http://127.0.0.1:1337/' );