Final working version: playlist API, persistent data, and deployment fixes

docker-compose.yml

@@ -17,7 +17,7 @@ services:
       - SECRET_KEY=Ma_Duc_Dupa_Merele_Lui_Ana
     volumes:
       # Bind mount the app folder for easier development and debugging
-      - ./app:/app
+      - ./data:/app
     restart: unless-stopped
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:5000/"]