add sub git and git-tools

app/page.tsx

@@ -0,0 +1,14 @@
+import { getPosts } from '@/lib/getPosts';
+import Posts from './posts';
+
+export const revalidate = 10;
+
+export default async function Page() {
+  const posts = await getPosts();
+
+  return (
+    <div className="space-y-6">
+      <Posts posts={posts} />
+    </div>
+  );
+}