chore(Matomo): put matomo into maintenance mode (#490)

[Anefu]

Pull Request Template

Proposed Changes

Description

This PR adds flags for disabling Matomo, prior to an upgrade (ref: https://matomo.org/faq/how-to/faq_111/)

Related Issues

• Closes Put Matomo into maintenance mode before upgrading #490

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Checklist

• I have read and followed the contributing guidelines for this repository.
• My code follows the coding style and standards of this project.
• I have tested my changes locally.
• I have added or updated necessary documentation (if applicable).
• All new and existing tests passed.
• My changes have been reviewed by at least one other contributor.
• I have updated the README or relevant documentation (if applicable).
• I have added proper labels to this PR (e.g., bug, enhancement, documentation, etc.).

[pmig]

Thanks for your contribution this will put Matomo into maintenance mode, but will not disable the maintenance mode after the upgrade was executed.

We need to also to adapt the install.sh file to disable the maintenance mode after plugins have been configured.

[Anefu]

Thanks for your contribution this will put Matomo into maintenance mode, but will not disable the maintenance mode after the upgrade was executed.

We need to also to adapt the install.sh file to disable the maintenance mode after plugins have been configured.

I added a sed command to remove the lines