Bump node from 23.0-alpine to 23.6-alpine

Bumps node from 23.0-alpine to 23.6-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Dockerfile

@@ -1,5 +1,5 @@
 # get official nodejs/npm binaries
-FROM node:23.0-alpine AS nodebuilder
+FROM node:23.6-alpine AS nodebuilder
 WORKDIR /opt/app
 COPY package-lock.json ./
 COPY package.json ./