Add Netlify _redirects for pretty URLs with proper 301 redirects

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

@@ -1,16 +0,0 @@
----
-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);
----