This is pretty cool but I have never managed to make it work with our AWS ECR repos. There are probably some permissions that I am missing but not very clear in the documentation how to do that.
There's a way to download a much larger "base image" which in theory would make it work, but if I remember rightly it was something like 60gb of containers which I was never patient enough to download. It was always quicker to just push up to github and iterate that way unfortunately.