• https://www.admin-magazin.de/Das-Heft/2018/12/Eigene-Registry-fuer-Docker-Images
• https://github.com/cesanta/docker_auth/
• https://github.com/cesanta/docker_auth/blob/master/examples/reference.yml#L264

docker run -d \
  --restart=always \
  --name registry \
  -v /etc/ssl/private:/certs \
  -e REGISTRY_HTTP_ADDR=0.0.0.0:443 \
  -e REGISTRY_HTTP_TLS_CERTIFICATE=/certs/registry.leotec.io.pem \
  -e REGISTRY_HTTP_TLS_KEY=/certs/registry.leotec.io.key \
  -p 5000:443 \
  registry:2

• https://docs.docker.com/registry/garbage-collection/

docker run --rm -ti -v registry_config:/config -v registry_data:/var/lib/registry registry:2 bin/registry garbage-collect /config/config.yml -m -d

• https://github.com/cesanta/docker_auth/