index.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous">
  <title>Add To Cart</title>
</head>
<body>
  <nav class="navbar bg-body-tertiary">
    <div class="container">
      <a class="navbar-brand">My Shop</a>
      <a href="cartPage.html">
        <button id="basket" type="button" class="btn btn-secondary btn-lg">Basket</button>
      </a>
    </div>
  </nav>

  <div class="container">
    <img src="https://pics.clipartpng.com/Grey_High_Sneakers_PNG_Clipart-489.png" alt="converse-shoes-illustration" height="200">
  </div>
  <script src="app.js"></script>
</body>
</html>