Running with docker-compose run -u $(id -u):$(id -g) potentially locks up execution

[mephenor]

Running the docker container as non-root consistently produces May 13, 2020 6:47:47 AM java.util.prefs.FileSystemPreferences checkLockFile0ErrorCode --- WARNING: Could not lock User prefs. Unix error code 2. May 13, 2020 6:47:47 AM java.util.prefs.FileSystemPreferences syncWorld --- WARNING: Couldn't flush user prefs: java.util.prefs.BackingStoreException: Couldn't get file lock. after random intervals of time, which potentially locks up the process indefinitely.

Creating .java/.userPrefs and .java/.systemPrefs within the container does not seem to work.