Amazon ECR is a solution for storing Docker containers and images I create. It's like an AWS version of Docker Hub, where I can store as many Docker containers as I need for any application and use these Docker images whenever I want. It also integrates with CodeDeploy. If there's a new commit or changes in the repository, the tool automatically updates the Docker images with these changes. So, I don't have to update them manually; it's all automated.
I use the solution with ECS because it supports auto-scaling. I configure auto-scaling groups to scale when traffic increases horizontally. It automatically creates new tasks and instances to handle more traffic. It also scales down when traffic decreases.