404 page

static/.htaccess

@@ -1,10 +1,14 @@
 RewriteEngine On
 RewriteBase /
 
+# Redirect old links
 RewriteRule ^(en|de)/(.*)$ /$2 [R=301,L]
 RewriteRule ^(en|de)/?$ / [R=301,L]
 RewriteRule ^about/?$ / [R=301,L]
 
+# Error documents
+ErrorDocument 404 /404.html
+
 # Compression
 AddOutputFilterByType DEFLATE text/plain
 AddOutputFilterByType DEFLATE text/html

themes/hugo-sustain/layouts/404.html

@@ -4,10 +4,14 @@
       {{ partial "header" . }}
       <div class="container">
         <div class="page-not-found">
-          <h3>Uh oh! Page not found!</h3>
+          <h1>Four-oh-four</h1>
+          <h3>Page not found :(</h3>
+          <h4>Go back to <a href="/">start</a>.</h4>
         </div>
       </div>
     </div>
     {{ partial "footer" . }}
+    {{ partial "js" . }}
+    {{ partial "matomo" . }}
   </body>
 </html>