chore(deps): bump node from 25-alpine to 26-alpine

Bumps node from 25-alpine to 26-alpine.

---
updated-dependencies:
- dependency-name: node
  dependency-version: 26-alpine
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Dockerfile

@@ -1,5 +1,5 @@
 # ── Stage 1: Build ────────────────────────────────────────────────────────────
-FROM node:25-alpine AS builder
+FROM node:26-alpine AS builder
 
 WORKDIR /app