The migration wizard detected the community deployment only by the
Docker Hub image prefix (netbirdio/netbird-server), so deployments
installed from the ghcr.io mirror failed with "Could not find a service
running netbirdio/netbird-server*".
This broadens the server and dashboard detection to also accept
ghcr.io/netbirdio/... images. The regexes are anchored at the tag/digest
separator so Enterprise images (netbird-server-cloud, dashboard-cloud)
are still rejected, an already-migrated deployment must not be detected
as a community one. Error messages updated to mention both forms.