First you need to create a Folder. That folder opens in the vs code and installs some packages. Some commands are available below.

*Commands *
1) npm init
2) npm install nodemon

Create file index.js After that looks like this:

index.js

var htttp = require("http");
var fs = require("fs");
var port = 1010;
var val = htttp.createServer(function (req, res) {
  fs.writeFile("testing.html", "This is 2021 ", function (err) {
    if (err) throw err;
    res.write("Your file Created..!");
    res.end();
  });
});

val.listen(port, () => {
  console.log("Server Started on ", port);
});

Then Start the server, Go to the command prompt and Type Command.

npx nodemon index.js

Your server will start, and your testing.html created in the folder looks like this.

testing.html