Image names with a port in the registry should be valid.

[k9withabone]

From containers/podlet#91.

Image names with a port in the registry are currently parsed with everything after the : treated as the image tag, causing the parsing to fail. For example, in ghcr.io:443/containers/podlet, 443/containers/podlet is treated the image tag. Both compose_spec::service::Image::parse() and compose_spec::service::image::Name::new() need to be fixed to allow for registry ports.