Connection to Collabora Online Built-in CODE Server not possible due to access rules

[MSmolarz]

Bug description

To use the Collabora Online - Built-in CODE Server, you must activate visitor access to nextcloud. Otherwise you will receive an error message like this:

Impossible to connect to Collabora Online. This might be due to a web server miss-configuration. Connecting Collabora Online built-in CODE Server with Nginx

After enabling the visitor access, the built-in CODE server runs immediately and works correctly.
Please add a note like the note on using the Nextcloud Desktop Client during the Nextcloud installation.
It would also be useful to include this and the note on using the Nextcloud Desktop Client in the info section of the installed nextcloud app.

Context

• Hardware: Raspberry Pi 4 Model B Rev 1.5
• YunoHost version: 11.2.19
• I have access to my server: Through SSH and through the webadmin
• Are you in a special context or did you perform some particular tweaking on your YunoHost instance?: no
• Using, or trying to install package version/branch: Nextcloud 29.0.2~ynh1