Publish Bottlerocket ECS Updater Image to ECR public and update updater stack

[Shailesh Gothi]

What I'd like:
For development purpose we have configured updater image as parameter in updater stack so that we can provide our personal image. Before release we should publish final updater image to ECR public so customers can pull it directly. We should also update the updater stack with ECR public updater image location.

Implementation Suggestion:
One option is to keep the existing UpdaterImage parameter and pass ECR public location as default.
Other option is to delete the UpdaterImage parameter and update TaskDefinition to use ECR public location.

[Samuel Karp]

One option is to keep the existing UpdaterImage parameter and pass ECR public location as default.

This approach would also let customers override and use their own image without also having to modify the CloudFormation template, so I think it's a good choice.

[Samuel Karp]

This is done.