Make docker images public

[mpetrun5]

For relaying partners to be able to run their own relayers we should make the docker images built on release public.

Implementation details

Switch to dockerhub and make them public there.

Testing details

Acceptance Criteria

[mpetrun5]

@rbadillap Do you have time to handle this?

[P1sar]

Can't we use github docker registry for this?

[mpetrun5]

We could. For open-source projects both are free. I think it is just a habit for open-source projects to use Dockerhub because of discoverability, but we don't care too much about that so it is fine either way. AWS as well should have a way to make it public.

[MakMuftic]

We also need this so we can use it in example repository.

[rbadillap]

@eedygreen, to accomplish this task, we should change the GitHub workflows and ECS task definitions to point to GitHub Docker Registry instead of AWS ECR.

AWS offers the possibility to make public our docker images using the AWS Public Gallery; you can discuss with the team if this is feasible or if they prefer using GitHub for that.

In both cases, the ECS task definition and the workflows should be adapted to this new way.