chore: Get rid of hosting config variable

templates/404.html

@@ -3,9 +3,9 @@
 {% block content %}
 <img src="{{ get_url(path='404.png') }}" class="full pixels transparent no-hover" />
 
-<h1>Document Not Found</h1>
+<h1>Page Not Found</h1>
 
-<p>The requested page could not be found. If you feel this is not normal, then you create an issue on the {{ config.extra.hosting }}.</p>
+<p>The requested page could not be found. If you feel this is not normal, then you create an issue on our issue tracker</p>
 
 <p class="dialog-buttons">
   <a onclick="window.history.go(-1)" class="inline-button">Go Back</a>