Add logs directory bind mount with entrypoint permission fix

- Add ./logs:/app/logs volume mount to docker-compose.yaml for log access
  - Create entrypoint.sh script that fixes directory ownership at startup
  - Install gosu in Dockerfile for secure privilege dropping
  - Use ENTRYPOINT to run permission fix as root, then drop to krawl user

  This ensures bind-mounted directories have correct permissions even when
  Docker creates them as root on the host.

docker-compose.yaml

@@ -11,6 +11,7 @@ services:
     volumes:
       - ./wordlists.json:/app/wordlists.json:ro
       - ./config.yaml:/app/config.yaml:ro
+      - ./logs:/app/logs
     environment:
       - CONFIG_LOCATION=config.yaml
     restart: unless-stopped