feat: Add server-side redirection to admin page based on public URL fetch

frontend/src/routes/admin/+page.server.ts

@@ -0,0 +1,17 @@
+import { redirect } from '@sveltejs/kit';
+import type { PageServerLoad } from '../$types';
+const PUBLIC_SERVER_URL = process.env['PUBLIC_SERVER_URL'];
+const endpoint = PUBLIC_SERVER_URL || 'http://localhost:8000';
+
+export const load: PageServerLoad = async (event) => {
+	let publicUrlFetch = await fetch(`${endpoint}/public-url/`);
+	let publicUrl = '';
+	if (!publicUrlFetch.ok) {
+		return redirect(302, '/');
+	} else {
+		let publicUrlJson = await publicUrlFetch.json();
+		publicUrl = publicUrlJson.PUBLIC_URL;
+	}
+
+	return redirect(302, publicUrl + '/admin/');
+};