<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="styles.css">
<link rel="manifest" href="manifest.json">
<title>My Progressive Web App</title>
</head>
<body>
<header>
<h1>Welcome to My PWA</h1>
</header>
<main>
<p>This is a simple Progressive Web App.</p>
<button id="notify-btn">Enable Notifications</button>
</main>
<script src="app.js"></script>
</body>
</html>
The Web App Manifest is a JSON file that provides metadata about your PWA, allowing it to be installed on a user's home screen.