api.server: Add missing coverage on make_app_from_configfile factory
This is actually what starts the server, so it sounds more reasonable to test that part.
Test Plan
tox
Migrated from D4306 (view on Phabricator)
This is actually what starts the server, so it sounds more reasonable to test that part.
tox
Migrated from D4306 (view on Phabricator)