calci_d7/msd_http.js

const http = require('http');
const hostname = '127.0.0.1';
const port = 3000;
const requestListener = function(req,res){
    res.statusCode=200;
    res.setHeader('content-Type','text/plain');
    res.end('Hello World\n Welcome to Mern Stack');
} 
const server = http.createServer(requestListener);
server.listen(port,hostname);