feat: QR code to the mastodon post used for comments, chnage some classes to IDs

templates/404.html

@@ -3,7 +3,7 @@
 {% block content %}
 <picture>
   <source srcset="{{ get_url(path='404.png') }}" media="(prefers-reduced-motion: reduce)"></source> 
-  <img srcset="{{ get_url(path='404.gif') }}" class="pixels transparent no-hover not-found">
+  <img id="not-found" class="pixels transparent no-hover" srcset="{{ get_url(path='404.gif') }}">
 </picture>
 
 <h1>Page Not Found</h1>