title: How to add a custom 404 page and a different Error page (for other errors) in SvelteKit?
body: <p>Basically, how to do the ff. in SvelteKit:</p>
  <ul>
  <li>Add a custom 404 page first.</li>
  <li>Have a different generic Error page that will show a message/description about the error in SvelteKit</li>
  </ul>