Exercise 2: Confirming No Default Rendering Engine — Possible Solution
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// server.js (view engine line removed)
const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.render('index', { title: 'Home' });
});

app.listen(3000);

OBSERVED RESULT
------------------------------
Visiting the route throws a real error, something like:
"Error: No default engine was specified and no extension was
provided." Express has no fallback rendering engine to reach for at
all - res.render() genuinely cannot function without an explicit
app.set('view engine', ...) call telling it which engine to use.

WHY THIS WORKS AS AN ANSWER
------------------------------
It correctly removes the view engine configuration and correctly
observes the resulting error, confirming that Express provides no
default rendering engine whatsoever - the chapter's own central claim,
demonstrated concretely rather than just asserted.