bundlerUpdateScript: init and use (#64822)

pkgs/tools/misc/docker-sync/default.nix

@@ -1,4 +1,4 @@
-{ lib, ruby, bundlerApp }:
+{ lib, ruby, bundlerApp, bundlerUpdateScript }:
 
 bundlerApp {
   pname = "docker-sync";
@@ -8,11 +8,13 @@ bundlerApp {
 
   exes = ["docker-sync"];
 
+  passthru.updateScript = bundlerUpdateScript "docker-sync";
+
   meta = with lib; {
     description = "Run your application at full speed while syncing your code for development";
     homepage = http://docker-sync.io;
     license = licenses.gpl3;
-    maintainers = [ maintainers.manveru ];
+    maintainers = with maintainers; [ manveru nicknovitski ];
     platforms = platforms.unix;
   };
 }