ECR for Elastic Container Registry (basically a private dockerhub).

Log in to ECR

$ aws ecr get-login-password | docker login --username AWS --password-stdin <aws_account_id>.dkr.ecr.eu-central-1.amazonaws.com

Pull image (same as dockerhub)

docker pull <aws_account_id>.dkr.ecr.eu-central-1.amazonaws.com/<image_name>:<tag>