Add pretty URL redirects: /slug -> /blog/slug

src/pages/[...id].astro

@@ -0,0 +1,16 @@
+---
+export const prerender = true;
+import { getCollection } from 'astro:content';
+
+export async function getStaticPaths() {
+  const posts = await getCollection('blog');
+  
+  return posts.map((post) => ({
+    params: { id: post.id },
+    props: { slug: post.id },
+  }));
+}
+
+const { slug } = Astro.props;
+return Astro.redirect(`/blog/${slug}`, 301);
+---