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/components/home-projects.tsx

@@ -0,0 +1,88 @@
+import Link from "next/link"
+import Image from "next/image"
+import { ArrowUpRight } from "lucide-react"
+import { ScrollRevealCard } from "@/components/scroll-reveal-card"
+
+const projects = [
+  {
+    title: "Böhler re:search",
+    description:
+      "Digital edition of the Munich art dealer Julius Böhler's object card system, photo folders and customer index (1903–1948). Research data on traded artworks, transactions and actors.",
+    href: "https://boehler.zikg.eu/",
+    icon: "/assets/icons/boehler-research.png",
+  },
+  {
+    title: "Objektsprache und Ästhetik",
+    description:
+      "Shell collections at Leopoldina, Goldfuß-Museum Bonn, and Central Institute for Natural Collections MLU. Historical object references and synonym networks for conchylia.",
+    href: "https://konchylien.leopoldina.org/sammlungen",
+    icon: "/assets/logos/lzfw_logo.png",
+  },
+  {
+    title: "SCS Manager",
+    description:
+      "Semantic Co-Working Space for academic university collections. Model, transform, analyse and publish data with JupyterLab, OpenRefine, WissKI and more.",
+    href: "https://manager.scs.sammlungen.io/",
+    icon: "/assets/icons/scs-manager.png",
+  },
+  {
+    title: "WissKI",
+    description:
+      "Semantic data management system for GLAM institutions. Virtual research environment extending Drupal with CIDOC CRM, Pathbuilder and linked open data.",
+    href: "https://wiss-ki.eu/",
+    icon: "/assets/icons/wisski.svg",
+  },
+]
+
+export function HomeProjects() {
+  return (
+    <section className="home-projects py-10" aria-labelledby="projects-heading">
+      <div className="home-projects-header mb-6 text-center">
+        <h2
+          id="projects-heading"
+          className="home-projects-title mb-3 font-bold tracking-tight text-slate-900"
+          style={{ fontSize: "var(--fluid-section-title)" }}
+        >
+          Projects
+        </h2>
+        <p
+          className="home-projects-description mx-auto max-w-3xl text-slate-600"
+          style={{ fontSize: "var(--fluid-hero-desc)" }}
+        >
+          Data- and information-focused websites and applications.
+        </p>
+      </div>
+      <div className="home-projects-grid grid gap-8 sm:grid-cols-2">
+        {projects.map((project) => (
+          <ScrollRevealCard key={project.href}>
+            <Link
+              href={project.href}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="home-projects-card group block rounded-xl border border-slate-200 bg-white p-8 outline-none transition-all duration-200 ease-out hover:border-emerald-500/40 hover:shadow-lg focus-visible:ring-2 focus-visible:ring-emerald-600 focus-visible:ring-offset-2"
+            >
+            <h3 className="home-projects-card-title mb-2 flex items-center gap-3 text-xl font-semibold text-slate-900">
+              <Image
+                src={project.icon}
+                alt=""
+                width={24}
+                height={24}
+                className="size-6 shrink-0 object-contain"
+                unoptimized
+              />
+              {project.title}
+            </h3>
+            <p className="home-projects-card-description mb-4 text-slate-600">
+              {project.description}
+            </p>
+            <span className="home-projects-card-link inline-flex items-center gap-2 text-sm font-medium text-emerald-600 transition-colors duration-200 ease-out group-hover:text-emerald-500">
+              Visit project
+              <ArrowUpRight className="size-4 transition-transform duration-200 ease-out group-hover:translate-x-0.5 group-hover:-translate-y-0.5" aria-hidden />
+            </span>
+          </Link>
+          </ScrollRevealCard>
+        ))}
+      </div>
+    </section>
+  )
+}