Add updated_at to pages

slices/main/templates/pages/show.html.slim

@@ -5,4 +5,6 @@ article class="mb-12 prose dark:prose-invert max-w-prose mx-auto text-gray-800 d
   h1= page_name
   == page_content
 
+  - if page_updated_at
+    ="Last updated: #{page_updated_at}"
 div class="max-w-screen-md mx-auto border-t border-solid border-gray-200 dark:border-gray-600"

slices/main/views/pages/show.rb

@@ -12,6 +12,10 @@ module Main
           page.name
         end
 
+        expose :page_updated_at do |page|
+          page.updated_at&.strftime("%m/%d/%Y")
+        end
+
         private_expose :page do |slug:|
           page_repo.fetch!(slug: slug)
         end