How to Host Express Applications

// Importing the Express module
import express from 'express';

// Creating a new Express application
const app = express();

// Defining the port as 80
// Port 80 is the default port for HTTP traffic.
const port = 80;

// Defining a route handler for the '/' route
// This route handler sends 'Hello World!' when accessed.
app.get('/', (req, res) => {
  res.send('Hello World!');
});

// Making our Express application listen on port 80
app.listen(port, () => {
  // This code block will be executed once the server is listening on port 80
  console.log(`Example app listening on port ${port}`);
});