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/Unit/Models/EmailTest.php

@@ -2,10 +2,10 @@
 
 namespace Tests\Unit\Models;
 
-use Illuminate\Support\Facades\Date;
 use App\Models\Email;
 use Carbon\Carbon;
 use Illuminate\Support\Facades\Config;
+use Illuminate\Support\Facades\Date;
 use Tests\TestCase;
 
 class EmailTest extends TestCase