chore(push): run unregistry only if containerd image store enabled for docker

internal/machine/machine.go

@@ -437,6 +437,12 @@ func (m *Machine) Run(ctx context.Context) error {
 
 			var unreg *unregistry.Registry
 			if m.config.ContainerdSockPath != "" {
+				isContainerdStore, err := m.dockerService.IsContainerdImageStoreEnabled(ctx)
+				if err != nil {
+					return fmt.Errorf("check if Docker uses containerd image store: %w", err)
+				}
+
+				if isContainerdStore {
 					// Create an embedded container registry listening on the machine IP address and
 					// using the local Docker (containerd) image store as its backend.
 					unreg, err = unregistry.NewRegistry(unregistry.Config{
@@ -449,6 +455,9 @@ func (m *Machine) Run(ctx context.Context) error {
 					if err != nil {
 						return fmt.Errorf("create embedded registry: %w", err)
 					}
+				} else {
+					slog.Warn("Skipping embedded unregistry setup as Docker is not using the containerd image store.")
+				}
 			} else {
 				slog.Warn("Skipping embedded unregistry setup as the containerd socket path is not configured.")
 			}