layouts/404.html

{{ define "main"}}
    <main id="main">
      <div class="mt-4 text-center">
       <h1 id="title">Not found</h1>
       <p>Oops! This page doesn't exist. Try going back to our <a href="{{ "/" | relURL }}">home page</a>.</p>
      </div>
    </main>
{{ end }}