fix: print service endpoints for run service only when non-empty

cmd/uncloud/service/run.go

@@ -148,11 +148,14 @@ func run(ctx context.Context, uncli *cli.CLI, opts runOptions) error {
 		return fmt.Errorf("inspect service: %w", err)
 	}
 
+	endpoints := svc.Endpoints()
+	if len(endpoints) > 0 {
 		fmt.Println()
 		fmt.Printf("%s endpoints:\n", svc.Name)
-	for _, endpoint := range svc.Endpoints() {
+		for _, endpoint := range endpoints {
 			fmt.Printf(" • %s\n", endpoint)
 		}
+	}
 
 	return nil
 }