This printout: CLEARML_API_ACCESS_KEY was not provided, service will not be started basically means the docker container entrypoint just exited with return code 0. Everything else is (I assume) related to Fargate?
As for peroviding 1 or 0, I think I see the problem - the entrypoint's code uses -n which checks for string length, so disabling this feature should be with simply not defining the env var, not by providing 0 🙂