v1.25.2

This release adds the ability to set a log level to facilitate easier debugging of live systems. It also solves a
production problem with a few over-users that resulted in Firebase quota problems (only applying to the over-users).
We now block visitors from using Firebase if they trigger a quota exceeded response.

On top of that, we updated the Firebase SDK and are now building the release in GitHub Actions. We've also got two
more translations: Chinese/Simplified and Dutch.

Features:

• Advanced logging, with different log levels and hot reloading of the log level (#284)

Bugs:

• Respect Firebase "quota exceeded" response for topics, block Firebase publishing for user for 10min (#289)
• Fix documentation header blue header due to mkdocs-material theme update (no ticket)

Maintenance:

• Upgrade Firebase Admin SDK to 4.x (#274)
• CI: Build from pipeline instead of locally (#36)

Documentation:

• ⚠️ Privacy policy updated to reflect additional debug/tracing feature (no ticket)
• Examples for Home Assistant (#282, thanks to @poblabs)
• Install instructions for NixOS/Nix (#282, thanks to @arjan-s)
• Clarify poll_request wording for iOS push notifications (#300, thanks to @prabirshrestha for reporting)
• Example for using ntfy with docker-compose.yml without root privileges (#304, thanks to @ksurl)

Additional translations:

• Chinese/Simplified (thanks to @yufei.im)
• Dutch (thanks to @SchoNie)