Cannot spin up Dockerized environment for CLI tests

Currently, attempting to bring up a Dockerized Dandi Archive instance using the latest dandi-archive image fails with:

```
  File "/opt/django/dandiapi/api/admin.py", line 69, in __init__
    self.actions += ['export_emails_to_csv', 'export_emails_to_plaintext']
TypeError: can only concatenate tuple (not "list") to tuple
```