Warnings:
- as @stephdl already explain you can safely ignore it: we’ve patched the PDF viewer
- if you do not user federation you can ignore it, see also this thread: Nextcloud: Your web server is not properly set up to resolve “/ocm-provider/” "/ocs-provider/"
- same as 2
- the configuration it’s used for autodiscover only if using caldav/cardav, it’s not mandatory. See https://docs.nethserver.org/en/v7/nextcloud.html#caldav-and-carddav
- same as 4
- there is no safe default for every locale, you can set it using occ