Nextcloud Docker + SWAG on root domain : no subdomain no subfolder


I installed successfully Nextcloud with Docker image.

I want to fire up a SWAG container.
In the GitHub repository, there are 2 conf samples : one for subdomain install and one for subfolder install.

Problem : my Nextcloud install is on directly.
Which sample could I use with SWAG container and what do I need to modify to make it working directly on the root domain ?

Thanks a lot.