It appears that the containers of clearml-serving couldn't access my host machine, because locahost referred to the container and not the host. However , changing the server address in the docker-compose.yml from localhost to host.docker.internal gives me another error:
clearml.backend_api.session.session.LoginError: Unrecognized Authentication Error: <class 'requests.exceptions.InvalidSchema'> No connection adapters were found for 'host.docker.internal:8008/auth.login'

Any idea what i am missing here?