./manage.py drf_create_token failing to output anything when provisioning Dockerized environment for dandi-cli tests

[jwodder]

Currently, when running the dandi-cli tests locally, the code for spinning up a Dockerized dandi-archive instance fails due to the drf_create_token command outputting an empty string instead of an auth token. Note that this only seems to happen when the commands are run via Python; when they are instead run directly from the command line, everything works. Also note that I am not convinced this isn't due to some change in a recent Docker update, unrelated to dandi-archive.

[jwodder]

The problem was caused by docker/compose#9201. I submitted a workaround as dandi/dandi-cli#949.