build(docker): Bump node from 20-alpine to 25-alpine

Bumps node from 20-alpine to 25-alpine.

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

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

Author: dependabot[bot]

Dockerfile

@@ -2,7 +2,7 @@
 # Multi-stage build for optimized production deployment
 
 # Stage 1: Build
-FROM node:20-alpine AS builder
+FROM node:25-alpine AS builder
 
 WORKDIR /app