Make app more resilient to missing vercel project meta

src/app/layout.tsx

@@ -21,7 +21,7 @@ const ibmPlexMono = IBM_Plex_Mono({
 export const metadata: Metadata = {
   title: SITE_TITLE,
   description: SITE_DESCRIPTION,
-  metadataBase: new URL(BASE_URL),
+  ...BASE_URL && { metadataBase: new URL(BASE_URL) },
   openGraph: {
     title: SITE_TITLE,
     description: SITE_DESCRIPTION,

src/site/config.ts

@@ -27,7 +27,7 @@ export const SITE_DESCRIPTION =
   SITE_DOMAIN;
 
 export const BASE_URL = process.env.NODE_ENV === 'production'
-  ? makeUrlAbsolute(SITE_DOMAIN).toLowerCase()
+  ? makeUrlAbsolute(SITE_DOMAIN)?.toLowerCase()
   : 'http://localhost:3000';
 
 // STORAGE: VERCEL BLOB

src/utility/url.ts

@@ -6,7 +6,7 @@ export const shortenUrl = (url?: string) => url
   : undefined;
 
 // Add protocol to url and remove trailing slash
-export const makeUrlAbsolute = (url = '') =>
-  (!url.startsWith('http')
-    ? `https://${url}`
-    : url).replace(/\/$/, '');
+export const makeUrlAbsolute = (url?: string) => url !== undefined
+  ? (!url.startsWith('http') ? `https://${url}` : url)
+    .replace(/\/$/, '')
+  : undefined;