server.js

// server.js
const http = require('http');
const fileSystem = require('fs');
const path = require('path');

const hostname = 'localhost';
const host_port = 8000;
const client_port = 8001;
const client_port2 = 8002;

const host_server = http.createServer((req, res) => {
    serveAsset('host', req.url, res)
}).listen(host_port, hostname, () => {
    console.log(`Server running at http://${hostname}:${host_port}/`);
});;
   
const client_server = http.createServer((req, res) => {
    serveAsset('client', req.url, res)
}).listen(client_port, hostname, () => {
    console.log(`Client running at http://${hostname}:${client_port}/`);
});

const client2_server = http.createServer((req, res) => {
  serveAsset('client2', req.url, res)
}).listen(client_port2, hostname, () => {
  console.log(`Client2 running at http://${hostname}:${client_port2}/`);
});
/*
const sharepoint_server = http.createServer((req, res) => {
  serveAsset('sharePoint', req.url, res)
}).listen(client_port2, hostname, () => {
  console.log(`SharePoint running at http://${hostname}:${client_port2}/`);
});
*/
function serveAsset(rootPath, url, res) {
    // default root route to index.html in the folder
    if (url === '/') url = 'index.html';
   
    const filePath = path.join(__dirname, rootPath, url)
    const readStream = fileSystem.createReadStream(filePath)
      .on('error', function() {
        res.statusCode = 404;
        res.end();
      });
   
    if (/^.*\.js$/.test(url)) {
      res.setHeader('Content-Type', 'text/javascript');
    } else {
      res.setHeader('Content-Type', 'text/html');
    }
    readStream.pipe(res);
}