fix: docker-compose.yaml

backend/docker-compose.yml

-version: "3.8"
-
 services:
   # --- Backend Service ---
   backend:
@@ -12,23 +10,8 @@ services:
       - .:/app
     environment:
       - PORT=8000
-      - CHECKPOINT_POSTGRES_URL=postgresql://postgres:password@postgres_db:5432/canifa_chat
-      - OPENAI_API_KEY=${OPENAI_API_KEY}
-      - LANGFUSE_PUBLIC_KEY=${LANGFUSE_PUBLIC_KEY}
-      - LANGFUSE_SECRET_KEY=${LANGFUSE_SECRET_KEY}
-      - LANGFUSE_HOST=${LANGFUSE_HOST}
-      - STARROCKS_HOST=${STARROCKS_HOST}
-      - STARROCKS_port=${STARROCKS_port}
-      - STARROCKS_USER=${STARROCKS_USER}
-      - STARROCKS_PASSWORD=${STARROCKS_PASSWORD}
-      - STARROCKS_DB=${STARROCKS_DB}
-    depends_on:
-      - postgres_db
     restart: unless-stopped
     logging:
       driver: "json-file"
       options:
         tag: "{{.Name}}"
-
-volumes:
-  postgres_data: