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-compose.yml

@@ -0,0 +1,61 @@
+version: '3.8'
+
+services:
+  app:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    restart: unless-stopped
+    ports:
+      - "${APP_PORT:-8000}:80"
+    environment:
+      - APP_ENV=${APP_ENV:-production}
+      - APP_DEBUG=${APP_DEBUG:-false}
+      - APP_URL=${APP_URL}
+      - DB_CONNECTION=${DB_CONNECTION:-mysql}
+      - DB_HOST=${DB_HOST:-mariadb}
+      - DB_PORT=${DB_PORT:-3306}
+      - DB_DATABASE=${DB_DATABASE:-zemail}
+      - DB_USERNAME=${DB_USERNAME:-zemail_user}
+      - DB_PASSWORD=${DB_PASSWORD:-secret}
+      - CACHE_STORE=${CACHE_STORE:-redis}
+      - QUEUE_CONNECTION=${QUEUE_CONNECTION:-redis}
+      - SESSION_DRIVER=${SESSION_DRIVER:-redis}
+      - REDIS_HOST=${REDIS_HOST:-redis}
+      - REDIS_PASSWORD=${REDIS_PASSWORD:-null}
+      - REDIS_PORT=${REDIS_PORT:-6379}
+    healthcheck:
+      test: [ "CMD", "curl", "-f", "http://localhost/health" ]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 30s
+    volumes:
+      - app-storage:/var/www/storage
+      - app-public-tmp:/var/www/public/tmp
+    depends_on:
+      - redis
+      - mariadb
+
+  redis:
+    image: redis:alpine
+    restart: unless-stopped
+    volumes:
+      - redis-data:/data
+
+  mariadb:
+    image: mariadb:10.11
+    restart: unless-stopped
+    environment:
+      - MYSQL_DATABASE=${DB_DATABASE:-zemail}
+      - MYSQL_USER=${DB_USERNAME:-zemail_user}
+      - MYSQL_PASSWORD=${DB_PASSWORD:-secret}
+      - MYSQL_ROOT_PASSWORD=${DB_ROOT_PASSWORD:-rootsecret}
+    volumes:
+      - mariadb-data:/var/lib/mysql
+
+volumes:
+  app-storage:
+  app-public-tmp:
+  redis-data:
+  mariadb-data: