Configuration of Seafile running in docker

I’m running Seafile-pro using docker behind Traefik using the configuration here:

What is the recommended way to create/edit configuration files (specifically using S3 storage backend) in this setup.
Should I launch the server, and then edit the configuration files within the created docker volume - or would it be possible to create the files on the host beforehand?

I would prefer the second option to make editing them more straightforward.