feat: Add docker and apptainer containers

[Nitnelav]

The docker build works well, the most uncertain part is the github actions.
Right now it builds on every pull request and publishes only when a tag like v1.3.1 is used.

It might need some tweaking before getting it right.

Closes #262

[sebhoerl]

Can we integrate this with the release creation process @leo-desbureaux-tellae ? Or is it better to do this on every? @Nitnelav Also depends if you think that this rather something that people want to use with the latest development version or with each release (I think we said more or less monthly). And if we do for every PR, will Github complain at some point? Or is it always the same files that are overridden?

[Nitnelav]

I think it should work fine as is ... the way the github action is set is :

• run a docker build . on every PR just to see if nothing fails, nothing is uploaded to any registry
• run the full build/sign/upload process on every release with a tag like v*.*.*, so typically after a manual merge of the release-please PR

We could narrow down the first part of the workflow to only the ones that modify the environment.yml file I guess if you want to limit the number of checks per PR.

[sebhoerl]

Yes, true, ok makes sense, then its good to merge I think

[Nitnelav]

OK let's go !