Add Drupal headless stack with Next.js frontend

- Add Next.js frontend service (nextjs) with Dockerfile and source
- Update docker-compose.yml: image names, Drupal 11.3.3, nextjs service
- Add docker-compose.override.yml.disabled for dev hot-reload
- Add install-headless-modules.sh for OAuth/JSON:API module setup
- Add README.md with full setup and configuration guide
- Update nginx/Dockerfile and nginx.conf.template for cms. subdomain
- Update drupal/Dockerfile PHP-FPM build args
- Gitignore **/.vscode/ to prevent IDE workspace files from being tracked

drupal/nextjs/next.config.ts

@@ -0,0 +1,20 @@
+import type { NextConfig } from "next"
+
+const nextConfig: NextConfig = {
+  images: {
+    qualities: [75, 95],
+    remotePatterns: [
+      {
+        protocol: "https",
+        hostname: process.env.NEXT_IMAGE_DOMAIN || "cms.nasarek.dev",
+      },
+    ],
+  },
+  // Enable standalone output for Docker.
+  output: "standalone",
+
+  // DevIndicators
+  devIndicators: false,
+}
+
+export default nextConfig