Right Thin Sidebar Layout
<body class="right-sidebar thin-sidebar d-flex flex-column h-100">
  <header>{{*header|core}}</header>
  <article class="container flex-shrink-0" role="main">
    {{_main|open}}
  </article>
  <aside>{{*sidebar|content}}</aside>
  <footer class="footer mt-auto py-3">{{*footer|core}}</footer>
</body>