Add a mirror for a registry
Set mirror for a given registry.
pack config registry-mirrors add <registry> [-m <mirror...] [flags]
pack config registry-mirrors add index.docker.io --mirror 10.0.0.1
pack config registry-mirrors add '*' --mirror 10.0.0.1
-h, --help help for add
-m, --mirror string Registry mirror
--force-color Force color output
--no-color Disable color output
-q, --quiet Show less output
--timestamps Enable timestamps in output
-v, --verbose Show more output