feat: Prepare Zemailnator for Dokploy deployment

- Add highly optimized Dockerfile with Nginx and PHP-FPM 8.4
- Add docker-compose.yml configured with Redis and MariaDB 10.11
- Implement entrypoint.sh and supervisord.conf for background workers
- Refactor legacy IMAP scripts into scheduled Artisan Commands
- Secure app by removing old routes with hardcoded basic auth credentials
- Configure email attachments to use Laravel Storage instead of insecure public/tmp

tests/Pest.php

@@ -1,7 +1,7 @@
 <?php
 
-use Tests\TestCase;
 use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
 
 /*
 |--------------------------------------------------------------------------
@@ -30,7 +30,7 @@ pest()->extend(TestCase::class)
 |
 */
 
-expect()->extend('toBeOne', fn() => $this->toBe(1));
+expect()->extend('toBeOne', fn () => $this->toBe(1));
 
 /*
 |--------------------------------------------------------------------------