```js const express = require('express'); // "app" is the invocation of the function createApplication() inside the Express module, where express is the default export const app = express(); // below we're handling ALL routes // all is a method that takes 2 args: // 1. route // 2. callback to run if the route is requested app.all('*', (req, res) => { // Compared to vanilla node where we had to write them explicitly, // Express handles the basic headers res.send('<h1>This is the homepage</h1>'); // Express also handles the end, whereas vanilla node doesn't }); app.listen(3000, () => console.log("The port is listening on: 3000.")); ```