Bonsai-webapp/src/app/app.html

<main class="container-fluid min-vh-100">
  <div class="row min-vh-100">
    <aside class="col-12 col-md-3 col-lg-2 p-0">
      <app-menu />
    </aside>

    <section class="col-12 col-md-9 col-lg-10 p-4" aria-live="polite">
      <router-outlet />
    </section>
  </div>
</main>