Create annotated Starterkit

site/controllers/album.php

@@ -1,5 +1,12 @@
 <?php
 
+/**
+ * Controllers allow you to separate the logic of your templates from your markup.
+ * This is especially useful for complex logic, but also in general to keep your templates clean.
+ * In this example, we define the `$gallery` variable which is passed to the template
+ * More about controllers: https://getkirby.com/docs/guide/templates/controllers
+ */
+
 return function ($page) {
 
     $gallery = $page->images()->sortBy("sort");