nezha-theme-user: add updateScript

pkgs/by-name/ne/nezha-theme-user/package.nix

@@ -2,6 +2,7 @@
   lib,
   buildNpmPackage,
   fetchFromGitHub,
+  nix-update-script,
 }:
 
 buildNpmPackage rec {
@@ -41,6 +42,8 @@ buildNpmPackage rec {
     runHook postInstall
   '';
 
+  passthru.updateScript = nix-update-script { extraArgs = [ "--generate-lockfile" ]; };
+
   meta = {
     description = "Nezha monitoring user frontend based on next.js";
     changelog = "https://github.com/hamster1963/nezha-dash-v1/releases/tag/v${version}";