fix: duplicate background color in code blocks

website/assets/css/base.pcss

@@ -15,6 +15,10 @@
     @apply p-4 my-8 overflow-auto rounded-md text-gray-700 bg-gray-200 dark:bg-gray-800 dark:text-gray-100;
   }
 
+  pre code {
+    @apply bg-transparent;
+  }
+
   iframe {
     @apply w-full;
   }