chore(deps): Bump node from 20-alpine to 25-alpine in /docker (#2)

Bumps node from 20-alpine to 25-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-version: 25-alpine
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

docker/nodejs.Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.4
 # Node.js execution environment with BuildKit optimizations
-FROM node:20-alpine
+FROM node:25-alpine
 
 # Install common build tools
 RUN apk add --no-cache \