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The container image builds are currently failing when installing timescaledb using localstack.cli.lpm. I'm not really familiar with the packaging system, but it seems to be a private package (localstack-ext?).

@alexrashed do you happen to know how that package can be updated?

Hi @Mins!
Thanks for your contribution! You are correct, timescaledb is used for our Pro extensions. Unfortunately, this will not allow to upgrade to the latest version of Debian so easily. I'm afraid we will stick to old-stable for a bit (bot not too long). Also, the Dockerfile and the package structure will be quite heavily refactored in a few days (we are currently working towards our next major release).
Is there a reason why you need to use Bullseye instead of Buster right now?

Thanks for the clarification @alexrashed ! Our organization has a policy of using only container images with updated base OSes, and the minimum required version for Debian was recently bumped up to Bullseye.

we will stick to old-stable for a bit (bot not too long).

Since there is already work planned for the upgrade, I'll be happy to close this PR. Can you kindly let me know if there is a rough timeline for the upgrade?

Unfortunately, we don't have a timeline for the upgrade yet. We are currently working on finalizing the next major release (see #7882). With v2, the Dockerfiles, and the whole way of building the images will be quite heavily refactored (but it only includes the upgrade to the latest 3.10 python bugfix version, not an upgrade from buster to bullseye). After the release, we'll take a closer look on the next upgrades.

Sorry I didn't explicitly post an update here earlier. We upgraded to bullseye some time ago with #8344.
LocalStack 2.1.0 is already based on Debian Bullseye (as mentioned in the release notes)