cache page url

config/environments/production.rb

@@ -52,6 +52,7 @@ Rails.application.configure do
     end
 
   config.active_storage.resolve_model_to_route = :rails_storage_proxy if ENV['ACTIVE_STORAGE_PUBLIC'] != 'true'
+  config.active_storage.service_urls_expire_in = 15.minutes
 
   # Mount Action Cable outside main process or domain.
   # config.action_cable.mount_path = nil

config/initializers/active_storage.rb

@@ -10,7 +10,11 @@ ActiveSupport.on_load(:active_storage_attachment) do
   end
 
   def preview_image_url
-    preview_images.joins(:blob).find_by(blob: { filename: '0.jpg' })&.url
+    first_page = preview_images.joins(:blob).find_by(blob: { filename: '0.jpg' })
+
+    return unless first_page
+
+    Rails.application.routes.url_helpers.rails_storage_proxy_url(first_page, **Docuseal.default_url_options)
   end
 end