Hi,
Thank you for this tuto.
I got the folowings errors when trying to install:
E: Unable to locate package coolwsd
E: Unable to locate package code-brand

I tried with
URIs: https://www.collaboraoffice.com/repos/CollaboraOnline/CODE-debian11
and with
URIs: https://www.collaboraoffice.com/repos/CollaboraOnline/CODE-deb (as it is in the current offical documentation).

Any help will be gratly appreciated!