- Pass MLFLOW_ADMIN_PASSWORD as fallback password credential - Set host_header='localhost' to satisfy MLflow's --allowed-hosts check (MLflow rejects Host: mlflow but accepts Host: localhost) - Default MLFLOW_TRACKING_URI to http://mlflow:5000 in compose so the env_file value is not silently overridden to empty Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>