Update Docker (fixes #255)

Change-Id: I0d2da433b82400afd07369031700f3532e7fffce
diff --git a/Dockerfile b/Dockerfile
index b32fe30..07c6391 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Build assets in builder image
-FROM node:21 AS assetbuilder
+FROM node:24 AS assetbuilder
 
 WORKDIR '/app'