chore(web): update sitemap

web/app/sitemap.ts

@@ -5,7 +5,14 @@ export default function sitemap(): MetadataRoute.Sitemap {
   const baseUrl = process.env.NEXT_PUBLIC_SITE_URL
 
   if (!baseUrl?.includes('textbee.dev')) {
-    return []
+    return [
+      {
+        url: baseUrl,
+        lastModified: new Date(),
+        changeFrequency: 'monthly' as const,
+        priority: 1,
+      },
+    ]
   }
 
   const routes = [