fix: update metadataBase URL in layout.tsx

This commit updates the `metadataBase` property in the `layout.tsx` file to use the environment variable `NEXT_PUBLIC_SITE_URL`, defaulting to "http://localhost:3000" if not set. This change ensures that the application correctly references the base URL for metadata across different environments.

Author: roderik

src/app/layout.tsx

@@ -18,9 +18,6 @@ const robotoMono = Roboto_Mono({
 });
 
 export const metadata: Metadata = {
-  metadataBase: new URL(
-    process.env.NEXT_PUBLIC_SITE_URL || "http://localhost:3000"
-  ),
   other: {
     "color-scheme": "light dark",
   },