Delete Images From Private Registry

First go to /etc/docker/registry/config.yml, We need to add config.yml delete enabled: true After run below command for restarting docker.

sudo systemcl restart docker.service

Go to docker registry

sudo docker exec -it registry sh

cd /var/lib/registry/docker/registry/v2/repositories/{app}/_manifests

revisions  tags

delete here sha

docker exec registry /bin/registry garbage-collect \\
  /etc/docker/registry/config.yml --delete-untagged