guidelines: more forceful herd guidelines

Author: ashleyhindle

.ai/herd/core.blade.php

@@ -1,2 +1,5 @@
-- This site is hosted with Laravel Herd. You MUST NOT ever run `artisan serve`.
 - The site is always available at: {{ config('app.url') }}
+- We do not need to run any commands to make the site available. It is always available through Herd at: {{ config('app.url') }}
+
+- This site is hosted with Laravel Herd. You MUST NOT ever run `artisan serve`.
+- You MUST NOT EVER run `php artisan serve`