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

.docker/supervisord.conf

@@ -0,0 +1,51 @@
+[supervisord]
+nodaemon=true
+user=root
+logfile=/var/log/supervisor/supervisord.log
+pidfile=/var/run/supervisord.pid
+
+[program:php-fpm]
+command=php-fpm -F
+autostart=true
+autorestart=true
+priority=5
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+
+[program:nginx]
+command=nginx -g 'daemon off;'
+autostart=true
+autorestart=true
+priority=10
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+stderr_logfile=/dev/stderr
+stderr_logfile_maxbytes=0
+
+[program:laravel-worker]
+process_name=%(program_name)s_%(process_num)02d
+command=php /var/www/artisan queue:work --sleep=3 --tries=3 --max-time=3600
+autostart=true
+autorestart=true
+stopasgroup=true
+killasgroup=true
+user=www-data
+numprocs=1
+redirect_stderr=true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0
+
+[program:laravel-scheduler]
+process_name=%(program_name)s_%(process_num)02d
+command=php /var/www/artisan schedule:work
+autostart=true
+autorestart=true
+stopasgroup=true
+killasgroup=true
+user=www-data
+numprocs=1
+redirect_stderr=true
+stdout_logfile=/dev/stdout
+stdout_logfile_maxbytes=0