I have a docker-compose file that maps a volume to the host.

When the mapping is a folder mapping I can write to the files in that folder from the container.

When I change the mapping to a specific file that file is read-only from the container and I have no idea why. I assume it can not be host file system permissions otherwise the file would also be read-only via the folder volume mapping.

docker-compose:

  domain-service:
    container_name: domain-service
    build:
      context: ../..
    ports:
      - "8080:8080"
      - "8888:8888"
    volumes:
      - ../../sqlite.db:/sqlite.db #file read only
      # ../../:/db. #db folder and contents writable from the container
    enter code here
    environment:
      APP_LOG_LEVEL: DEBUG
    depends_on:
      - multi-stub