feat: basic sitemap generation

src/app/sitemap.ts

@@ -0,0 +1,17 @@
+import type { MetadataRoute } from "next";
+import { client } from "../../studio/lib/client";
+import { Slug } from "../../studio/lib/payloads/global";
+
+interface SitemapDocument {
+  slug: Slug;
+  _updatedAt: string;
+}
+
+export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
+  const documents = await client.fetch<SitemapDocument[]>(`*[defined(slug)]`);
+
+  return documents.map((s) => ({
+    url: new URL(s.slug.current, process.env.NEXT_PUBLIC_URL).toString(),
+    lastModified: new Date(s._updatedAt),
+  }));
+}