🐕 Batch: Add versioning in Docker builds

[DhanshreeA]

Summary

Right now all our Docker images are tagged "latest" by default. This is quite problematic, since we cannot roll back to a version we knew worked (especially since we don't have tests for the builds themselves). Another reason why this would have been nice to have is for sake of comparison around size differences between older builds and the new slimmer builds. I reckon this would not be entirely easy to implement since the ersilia cli isn't tag aware and always pulls the latest tag.

Objectives

###Documentation

[miquelduranfrigola]

We decided:

1. Versioning Ersilia base image (and other images created with the corresponding GitHub Action in the ersilia CLI repo). Version should be in synch with the actual ersilia version. The latest tag should continue to exist.
2. Models will be versioned with a timestamp (e.g. 2024.03.18).
3. The version of the ersilia base image used for building the model will be implicit and can be queried at model building time. Importantly, the FROM ersiliaos/ersilia:latest used at model building time should be replaced to use the exact version of the ersilia base image. This should be done dynamically in the GitHub Action.
4. We should add a flag to the ersilia fetch command (e.g. --version 2024.03.18) in case users want to use an older version of the model.

[GemmaTuron]

Hi @DhanshreeA

Have the decisions set above been converted to actual tasks? Is this a Batch or an Epic, and are there other issues open related to this?

[DhanshreeA]

@GemmaTuron the discussion above has not been converted to tasks, and I would qualify this as a batch since it would take a non trivial amount of effort to complete this, however not as intense as an epic/sprint.

[GemmaTuron]

Once we start tackling this, please define specific tasks as individual issues to be tackled. Meanwhile it will remain on hold.

[GemmaTuron]

Hi @DhanshreeA
Is this planned for the coming weeks or the task is still on hold?

[DhanshreeA]

@GemmaTuron I think we now have sufficient bandwidth to fully tackle this in the coming weeks. I will prioritise this starting next week.

[DhanshreeA]

Updates:

1. We have a PR here to implement tagging model images dynamically based on the time stamp from when the image build succeeds.
2. We're adding a flag --version to the Ersilia repo to allow users to fetch specific images.