deps(docker): bump node from 22-alpine to 25-alpine

Bumps node from 22-alpine to 25-alpine.

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Dockerfile

@@ -1,7 +1,7 @@
 # Multi-stage build for Windshift server
 
 # Stage 1: Build frontend
-FROM node:22-alpine AS frontend-builder
+FROM node:25-alpine AS frontend-builder
 
 WORKDIR /build