feat: add sitemap

Author: KodingDev

src/app/not-found.tsx

@@ -0,0 +1,23 @@
+import type { Metadata } from "next";
+
+export const metadata: Metadata = {
+  title: "Page Not Found",
+  description: "The page you're looking for doesn't exist.",
+  robots: { index: false },
+};
+
+export default function NotFound() {
+  return (
+    <div className="layout-container flex min-h-screen flex-col items-center justify-center gap-8 px-4 py-16 text-center">
+      <div className="flex flex-col gap-4">
+        <h1 className="font-bold text-9xl">404</h1>
+        <div className="h-1 w-full rounded-full bg-gradient-to-r from-transparent via-white/25 to-transparent" />
+      </div>
+
+      <div className="flex flex-col gap-3">
+        <h2 className="font-bold text-3xl">Page Not Found</h2>
+        <p className="text-lg opacity-50">Looks like you got lost... how peculiar</p>
+      </div>
+    </div>
+  );
+}

src/app/robots.ts

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+import type { MetadataRoute } from "next";
+
+export default function robots(): MetadataRoute.Robots {
+  return {
+    rules: {
+      userAgent: "*",
+    },
+    sitemap: "https://koding.dev/sitemap.xml",
+  };
+}

src/app/sitemap.ts

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+import type { MetadataRoute } from "next";
+import { allArtists, allClients } from "@/lib/content";
+
+const BASE_URL = "https://koding.dev";
+
+export default function sitemap(): MetadataRoute.Sitemap {
+  return [
+    // Home
+    {
+      changeFrequency: "monthly",
+      priority: 1,
+      url: BASE_URL,
+    },
+    // Clients
+    {
+      changeFrequency: "monthly",
+      priority: 0.8,
+      url: `${BASE_URL}/clients`,
+    },
+    ...allClients.map(
+      (client) =>
+        ({
+          changeFrequency: "monthly",
+          priority: 0.7,
+          url: `${BASE_URL}/clients/${client.slug}`,
+        }) satisfies MetadataRoute.Sitemap[0]
+    ),
+    // Art
+    {
+      changeFrequency: "monthly",
+      priority: 0.6,
+      url: `${BASE_URL}/art`,
+    },
+    ...allArtists.flatMap((artist) =>
+      artist.commissions.map(
+        (commission) =>
+          ({
+            changeFrequency: "monthly",
+            priority: 0.5,
+            url: `${BASE_URL}/art/${artist.slug}/${commission.slug}`,
+          }) satisfies MetadataRoute.Sitemap[0]
+      )
+    ),
+  ];
+}