deep-learning-tools2: Permission denied: '/.trash'

[frafra]

I built https://github.com/UNINETTSigma2/helm-charts-dockerfiles/blob/0fbf527ad655238877c1ad633fce7cb370671a3e/deep-learning-tools2/Dockerfile and run it on my workstation; I have encountered this error: Permission denied: '/.trash'.

2022/03/03 13:06:49 ERROR mlflow.cli: Error initializing backend store
2022/03/03 13:06:49 ERROR mlflow.cli: [Errno 13] Permission denied: '/.trash'
Traceback (most recent call last):
  File "/opt/conda/lib/python3.9/site-packages/mlflow/cli.py", line 411, in server
    initialize_backend_stores(backend_store_uri, default_artifact_root)
  File "/opt/conda/lib/python3.9/site-packages/mlflow/server/handlers.py", line 258, in initialize_backend_stores
    _get_tracking_store(backend_store_uri, default_artifact_root)
  File "/opt/conda/lib/python3.9/site-packages/mlflow/server/handlers.py", line 243, in _get_tracking_store
    _tracking_store = _tracking_store_registry.get_store(store_uri, artifact_root)
  File "/opt/conda/lib/python3.9/site-packages/mlflow/tracking/_tracking_service/registry.py", line 39, in get_store
    return self._get_store_with_resolved_uri(resolved_store_uri, artifact_uri)
  File "/opt/conda/lib/python3.9/site-packages/mlflow/tracking/_tracking_service/registry.py", line 49, in _get_store_with_resolved_uri
    return builder(store_uri=resolved_store_uri, artifact_uri=artifact_uri)
  File "/opt/conda/lib/python3.9/site-packages/mlflow/server/handlers.py", line 105, in _get_file_store
    return FileStore(store_uri, artifact_uri)
  File "/opt/conda/lib/python3.9/site-packages/mlflow/store/tracking/file_store.py", line 149, in __init__
    mkdir(self.trash_folder)
  File "/opt/conda/lib/python3.9/site-packages/mlflow/utils/file_utils.py", line 114, in mkdir
    raise e
  File "/opt/conda/lib/python3.9/site-packages/mlflow/utils/file_utils.py", line 111, in mkdir
    os.makedirs(target)
  File "/opt/conda/lib/python3.9/os.py", line 225, in makedirs
    mkdir(name, mode)
PermissionError: [Errno 13] Permission denied: '/.trash'

The user has no permission to create such directory. It does not happen when running the image as root.