feat: support markdown and add "privacy policy"

src/app/[locale]/pages/[slug]/page.tsx

@@ -23,7 +23,7 @@ export default async function Page({
 }
 
 export function generateStaticParams() {
-  return [{ slug: 'privacy' }]
+  return [{ slug: 'welcome' }, { slug: 'about' }]
 }
 
 export const dynamicParams = false