Use Alpine 3.24 stable Node base image

README.md

@@ -17,3 +17,6 @@ access to `k2patel/floodui`. Builds run remotely on the Kubernetes runner for
 runner image store, and the temporary builder and cache are removed afterward.
 No image archives or build records are uploaded to Gitea, and no local container
 builds are required.
+
+Base image: Node.js 24 on Alpine Linux 3.24 stable (`node:24-alpine3.24`),
+including the latest patch updates in those release series.