add canonical for individual pages. unfortunately we cannot link to correct page

src/helpers/Markdown.php

@@ -60,7 +60,7 @@ class Markdown extends \Parsedown
         $config->set('URI.AllowedSchemes', array('http' => true, 'https' => true, 'mailto' => true, 'ftp' => true));
         $config->set('HTML.TargetBlank', true);
         $config->set('HTML.Nofollow', true);
-        
+
         $purifier = new \HTMLPurifier($config);
 
         return $purifier->purify($html);

src/templates/page.twig

@@ -9,6 +9,8 @@
     {% if currentPage != numPages %}
         <link rel="next" href="{{ path_for('page', [], { 'page': nextPage }) }}"/>
     {% endif %}
+
+    <link rel="canonical" href="https://github.com/matomo-org/matomo/issues/" />
 {% endblock %}
 
 {% block content %}