terracotta: add updateScript

pkgs/by-name/te/terracotta/package.nix

@@ -6,6 +6,7 @@
   easytier,
   replaceVars,
   imagemagick,
+  nix-update-script,
 }:
 
 rustPlatform.buildRustPackage (finalAttrs: {
@@ -89,6 +90,8 @@ rustPlatform.buildRustPackage (finalAttrs: {
         --replace-fail '@TERRACOTTA_BIN@' "$out/bin/terracotta"
     '';
 
+  passthru.updateScript = nix-update-script { extraArgs = [ "--generate-lockfile" ]; };
+
   meta = {
     description = "Terracotta provides out-of-the-box multiplayer support for Minecraft";
     homepage = "https://github.com/burningtnt/Terracotta";