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

@@ -1,6 +1,6 @@
 # Multi-stage Dockerfile for Codex
 # Stage 1: Build
-FROM node:25-alpine AS builder
+FROM node:26-alpine AS builder
 
 WORKDIR /app
 
@@ -20,7 +20,7 @@ COPY client/ ./client/
 RUN npm run build
 
 # Stage 2: Production
-FROM node:25-alpine AS production
+FROM node:26-alpine AS production
 
 WORKDIR /app