update,

aastock/1/blog/app/sitemap.ts

@@ -0,0 +1,17 @@
+import { getBlogPosts } from 'app/blog/utils'
+
+export const baseUrl = 'https://portfolio-blog-starter.vercel.app'
+
+export default async function sitemap() {
+  let blogs = getBlogPosts().map((post) => ({
+    url: `${baseUrl}/blog/${post.slug}`,
+    lastModified: post.metadata.publishedAt,
+  }))
+
+  let routes = ['', '/blog'].map((route) => ({
+    url: `${baseUrl}${route}`,
+    lastModified: new Date().toISOString().split('T')[0],
+  }))
+
+  return [...routes, ...blogs]
+}