added /admin for admin panel - limited to users in the admin role (also updated local .env to match prod keys for clerk)

src/pages/admin.astro

@@ -0,0 +1,18 @@
+---
+export const prerender = false;
+import Layout from '../layouts/Main.astro';
+import NavItems from '../components/NavItems.astro';
+import NavBar from '../components/NavBar.astro';
+import Footer from '../components/Footer.astro';
+---
+<Layout title="Admin Panel">
+  <NavBar slot="navbar">
+    <NavItems slot="navItems" />
+  </NavBar>
+  <div class="row mb-4" slot="page">
+    <div class="col-12">
+      <h1>Admin Panel</h1>
+    </div>
+  </div>
+  <Footer slot="footer" />
+</Layout>