feat: production stack (gunicorn+nginx) and infra product URL import

docker-compose.yml

@@ -1,11 +1,20 @@
 services:
-  zkart:
+  app:
     build: .
     container_name: zkart-app
-    ports:
-      - "5000:5000"
     environment:
       SECRET_KEY: ${SECRET_KEY:-change-me-please}
     volumes:
       - ./matrix.db:/app/matrix.db
     restart: unless-stopped
+
+  nginx:
+    image: nginx:1.27-alpine
+    container_name: zkart-nginx
+    depends_on:
+      - app
+    ports:
+      - "5000:80"
+    volumes:
+      - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
+    restart: unless-stopped