Apologies to anyone finding this commit via git blame or log run the autoformatting by pre-commit run --all-files
For some reason the notebook server doesn't exit when we send the SIGTERM signal to the container and as a result waiting for the container to shutdown leads to an exit code of 137 (the notebook server gets kill by SIGKILL).
fix some relative paths, temporary dirs, etc.
for easier test discovery so we don't skip tests without realizing