Every of your links is about the webmail app not nextcloud as a whole

Because newspapers are not forced to give out their news for free. But they have to give you an alternative to selling your data; taking money from you in this case.

Ah right, sorry; the company doesn’t support it directly but the docs provide an example. To me as tinkerer that was solid enough 😂😅

Nginx is supported and a good choice. What database are you using? I’d recommend MariaDB.

I am using headscale without any issues