fix: missing script url (#1634)

Author: annarhughes

scriptUrls.js

@@ -1,7 +1,7 @@
 const API_URL =
   process.env.NODE_ENV === 'development'
     ? 'http://localhost:35001'
-    : new URL(process.env.NEXT_PUBLIC_API_URL).hostname;
+    : new URL(process.env.NEXT_PUBLIC_API_URL || 'http://localhost:35001').hostname;
 
 const scriptSrcUrls = [
   API_URL,