Add dynamic entries function for post prerendering

src/routes/posts/[slug]/+page.ts

@@ -1,6 +1,14 @@
 import type { PageLoad } from './$types';
 import { error } from '@sveltejs/kit';
 
+export const entries = () => {
+	const posts = import.meta.glob('../*.md', { eager: true });
+	return Object.keys(posts).map((path) => {
+		const slug = path.replace('../', '').replace('.md', '');
+		return { slug };
+	});
+};
+
 export const load: PageLoad = async ({ params }) => {
 	try {
 		const post = await import(`../${params.slug}.md`);