text: 
  const express = require('express');
  const path = require('path');
  const port = process.env.PORT;
  const app = express();
  // the __dirname is the current directory from where the script is running
  app.use(express.static(__dirname));
  
  // send the user to index html page inspite of the url
  app.get('*', (req, res) => {
    res.sendFile(path.resolve(__dirname, 'index.html'));
  });
  
  app.listen(port);
  