# setup
pip install --upgrade awscli
aws configure

# login (to pull and push images)
aws ecr get-login
docker loging -u ... blah blash..

# pull image (download after aws registry authentication)
docker pull my_registryid.dkr.ecr.us-west-2.amazonaws.com/my_folder/repo_tag_name

# build & push image to registry
docker build -t my_tag -f Dockerfile.my_image_name .
docker tag my_tag my_registryid.dkr.ecr.us-west-2.amazonaws.com/my_folder/repo_tag_name

# utilities
docker images