delete removed Docker containers from store, sync only uncloud labeled

internal/machine/docker/container/container.go

@@ -2,6 +2,11 @@ package container
 
 import "github.com/docker/docker/api/types"
 
+const (
+	LabelServiceID   = "uncloud.service.id"
+	LabelServiceName = "uncloud.service.name"
+)
+
 type Container struct {
 	types.Container
 }