curl -s https://registry.hub.docker.com/v2/repositories/library/nginx/tags | jq '.results[].name'
curl -s https://registry.hub.docker.com/v2/repositories/library/postgres/tags | jq '.results[].name'
curl -s https://registry.hub.docker.com/v2/repositories/kylemanna/openvpn/tags?page_size=100 | jq '.results[].name'
curl -s https://registry.hub.docker.com/v2/repositories/openvpn/openvpn-as/tags?page_size=100 | jq '.results[].name'