feat: Expose website as a flake

layout/page.html

@@ -10,8 +10,7 @@
 	  content="width=device-width, initial-scale=1.0, maximum-scale=1" />
 
     <link rel="stylesheet" href="assets/css/index.css" />
-    <!-- TODO -->
-    <link rel="stylesheet" href="https://cdn.polynom.me/css/main.css" />
+    <link rel="stylesheet" href="{{ page_assets }}/css/main.css" />
 
     <!-- Mastodon -->
     <link rel="me" href="https://{{ mastodon_instance_url }}/{{ mastodon_handle }}" />