server.js

#!/usr/bin/env node
"use strict";

const http = require("node:http");
const port = process.env.SERVER_PORT || "8000";

http.createServer((req, rsp) => {
    rsp.writeHead(200,{ 
      "Content-Type": "text/plain"
    });
    rsp.end("Hello! Server");
}).listen(port);

console.info(`Server is running at http://localhost:${port}`);