MediaWiki-Docker uses an image based on buster and PHP 8.1. Considering that:
- The image has been broken for months due to buster being EOL (T362702)
- Production is moving to PHP 8.1 reeeeal soon (T319432)
- The next PHP target for production is PHP 8.3: T360995
I am proposing that MediaWiki-Docker be updated to use a new image based on PHP 8.3 (and not-EOL Debian, possibly Bookworm). This would allow us to keep development ahead of production and catch incompatibilities earlier.