Prep for Debian bookworm and 5.38

[zakame]

• https://www.debian.org/News/2023/20230610
• http://nntp.perl.org/group/perl.perl5.porters/266489

We'll likely go ahead and switch to bookworm/bullseye on the supported versions now (and keep bullseye/buster for the rest) while we await the 5.38.0 release later this month.

[AnaTofuZ]

I would be grateful if you could provide support for Debian Buster, as it is still within its End of Life (EOL) period.

[zakame]

According to https://wiki.debian.org/DebianReleases buster received its final update and thus already EOL since 2022-09-10. We generally follow the policy of docker-library when the selection of Debian base is involved, see e.g. #88 and docker-library/official-images#8405 - in particular, we won't be able to do builds on Debian LTS (post-EOL) releases as the docker-library base only up to the last point release (e.g. docker-library/official-images#14832.) cc @tianon as he would know better than me 🙏

For now though, we could do a 5.38.0/5.36.1 release on bookworm/bullseye/buster then switch to bookwork/bullseye only when 5.38.1 arrives - let me know if that works for you @AnaTofuZ 🙏

[tianon]

We usually try to avoid supporting more than two releases of a given distribution per version for things that are on the heavier side to build (esp. building from source), like Python, Ruby, etc. 😬

The Debian Buster base images will still be maintained/updated through the LTS period though (but specifically not ELTS, so until ~2024-06-30, and the limited set of supported LTS architectures will be reflected in the updated images), and we'll support you if you feel strongly that you really should continue building/supporting Debian Buster-based images (and would just ask that you limit that set to what's really necessary/important).

[zakame]

Perl 5.38.0 now on Docker Hub 🎉