Nextcloud version (eg, 20.0.5): 21.0.4
Operating system and version (eg, Ubuntu 20.04): Debian 10 buster
Apache or nginx version (eg, Apache 2.4.25): Nginx 1.14.2
PHP version (eg, 7.4): 7.3
The issue you are facing:
I have a perfectly working Nextcloud server. I just want to upgrade the OS of the server from Debian 10 to 11; however, I am afraid that this would break my Nextcloud instance. Debian 11 comes with Postgresql 11, PHP 7.4 and Nginx 1.18.0. What is the best way to handle this process in the most graceful way? It feels to me that any of these upgrades, even without upgrading the OS can easily break Nextcloud. Is it more feasible to just reinstall Nextcloud instead? If so, is there a list of config files, database directories, etc. that need to be carried over? Please excuse my ignorance, I would really appreciate any pointers.