Questions about balenalib/raspberry-pi Docker images

Hi,

I am seeking maintained Raspberry Pi OS images, as a convenient way for developers to build and test packages for Raspberry Pi, without resorting to virtual machines or physical hardware.

I recently found balenalib/raspberry-pi. To clarify, did that image ever have functional base contents for Raspberry Pi OS? I get the impression that this image’s purpose was originally a testbed for flashing RPi’s.

However, the image was soon deprecated:

Unfortunately, there is no Raspberry Pi OS image that was ever maintained as diligently as the balena collection. The images have been deprecated with no replacement.

balenalib/raspberry-pi was deprecated before it could update to the most recent Raspberry Pi OS, based on Debian 13 (trixie).

Anyone interested in maintaining a fork?