nextcloud migration

[stavros-k]

No description provided.

[stavros-k]

TODO's:

• Port all settings from previous version
• Add tests for most common config scenarios (http, https, etc)
• Figure out the storage part (Take into account add additional mount for user data #1557)
• Write migration script
• Check nginx config that is up-to-date with nextcloud's recommendations (check overview for warnings) Will be done on separate PR as I'd like to also take into account NC 29 potential suggestions
• Update to_keep_versions accordingly Will do right after nextcloud: pre-migration actions #2412 is merged
• Handle the db back, because nextcloud creates its own user and database on intial setup and ignores the predifined one we setup
• Test upgrades from 2.0.0 to 2.0.1 (backups performed etc)
• Test upgrades from 1.x.x to 2.x.x
• After everything is up and running, plug redis in [Issue] NextCloud Application - Missing Redis DB #1304, which should be less than 15lines of code and a nice improvement.~

[frederickjansen]

@stavros-k could you please add this as well if you haven't already? #2078
Thanks!

[stavros-k]

@stavros-k could you please add this as well if you haven't already? #2078 Thanks!

I can do right after this PR, but I believe that nextcloud container does not have the required packages installed by default for that to work.