fix: prevent VK downloader from blocking queue

vk-downloader/docker-compose.yml

@@ -3,8 +3,13 @@ services:
     build: .
     container_name: vk_downloader_service
     restart: unless-stopped
-    network_mode: host
+    ports:
+      - "127.0.0.1:5555:5555"
     volumes:
       - ./downloads:/app/downloads
     environment:
       - PORT=5555
+      - GUNICORN_WORKERS=2
+      - GUNICORN_THREADS=4
+      - GUNICORN_TIMEOUT=360
+      - GUNICORN_KEEP_ALIVE=5