micrach/templates/404.html

<html lang="en">
<head>
  {{ template "static" }}
  <link 
    href="/static/error-image.css" 
    rel="stylesheet" 
  >

  {{ template "static-meta" }}
</head>

<body>
  <div class="h-100 d-flex justify-content-center align-items-center flex-column">
    <h1>404</h1>
    <h1>PAGE NOT FOUND</h1>
    <img
      class="error-image"
      src="/static/images/errors/404.png"
      alt="All broken"
    >
  </div>
</body>

</html>