Addresses that do not carry a scheme cause errors on database migration.
SystemCheckError: System check identified some issues:
ERRORS:
?: (corsheaders.E013) Origin 'example.com' in CORS_ALLOWED_ORIGINS is missing scheme or netloc
HINT: Add a scheme (e.g. https://) or netloc (e.g. example.com).
In theory, this package is optional since not everybody wants to compile translations.
Without other changes to step 5. (i.e. making it explicit that `python3 manage.py compilemessages` is not mandatory), not installing `gettext` results in an error when blindly copy-pasting the steps.