Add hello.js

hello.js

+const http = require("http");
+http.createServer(function (req, res) {
+   // Send the HTTP header 
+   // HTTP Status: 200 : OK
+   // Content Type: text/plain
+   res.writeHead(200, {'Content-Type': 'text/plain'});
+   
+   // Send the response body as "Hello, World !!!"
+   res.end('node js hello world !!! \n');
+}).listen(8000);