Update nextcloud to version v30.0.0

[nmfretz]

🤖 This is an automated pull request to update nextcloud to version v30.0.0. This PR must be reviewed and tested before merging.

[nmfretz]

🤖 This is an automated summary of installation tests for nextcloud:

• ✅ App successfully installed in umbrel-dev VM
• ✅ App successfully listed in umbrel.yaml
• ✅ App UI successfully returns a 200 status code
• 📸 Screenshot of the app:
  

This PR must still be reviewed and tested before merging.

[nmfretz]

This will require a rewrite of the pre-start script to properly handle migrations now that we are on v30

[github-actions]

🎉   Linting finished with no errors or warnings   🎉

Thank you for your submission! This is an automated linter that checks for common issues in pull requests to the Umbrel App Store.

Please review the linting results below and make any necessary changes to your submission.

Linting Results

Severity	File	Description
ℹ️	nextcloud/docker-compose.yml	Potentially using unsafe user in service "web": The default container user "root" can lead to security vulnerabilities. If you are using the root user, please try to specify a different user (e.g. "1000:1000") in the compose file or try to set the UID/PUID and GID/PGID environment variables to 1000.
ℹ️	nextcloud/docker-compose.yml	Potentially using unsafe user in service "cron": The default container user "root" can lead to security vulnerabilities. If you are using the root user, please try to specify a different user (e.g. "1000:1000") in the compose file or try to set the UID/PUID and GID/PGID environment variables to 1000.

Legend

Symbol	Description
❌	Error: This must be resolved before this PR can be merged.
⚠️	Warning: This is highly encouraged to be resolved, but is not strictly mandatory.
ℹ️	Info: This is just for your information.

[nmfretz]

• Updated the pre-start script to handle migration from any minor/patch version to the next major version.
• Added v30 release notes
• Tested fresh install
• Tested variety of updates from up to 3 major versions ago

[dennysubke]

Thanks for the update!

However, I receive a warning in my Nextcloud instance about the MariaDB version in use:

“For optimal performance and stability, it is recommended to use MariaDB version > 10.6 or 11.4.”

[nmfretz]

Thanks for noting this @dennysubke! Shall we schedule the mariadb update for Nextcloud 30.0.1 which should be out soon (https://github.com/nextcloud/server/milestone/279)?

We'll need to be careful when updating mariadb and may need to run some mariadb specific migration logic in the pre-start script when we do so (https://mariadb.com/kb/en/mariadb-upgrade/).