backend-server-v2/web/templates/admin.html

{{define "content"}}
<section class="rounded-lg border border-gray-200 bg-white p-8 shadow-sm dark:border-gray-700 dark:bg-gray-800">
  <h1 class="text-3xl font-bold text-gray-900 dark:text-white">admin page</h1>
</section>
{{end}}