extract indexDomain to env var

src/components/UI/Search.tsx

@@ -6,13 +6,12 @@ export const Search: React.FC = () => {
   const appId = process.env.NEXT_PUBLIC_ALGOLIA_APP_ID || '';
   const apiKey = process.env.NEXT_PUBLIC_ALGOLIA_SEARCH_API_KEY || '';
   const indexName = process.env.NEXT_PUBLIC_ALGOLIA_BASE_SEARCH_INDEX_NAME || '';
-
-  // TODO: Replace Algolia test keys with above env vars when ready
+  const indexDomain = process.env.NEXT_PUBLIC_ALGOLIA_INDEX_DOMAIN || 'https://melodious-puffpuff-8e1109.netlify.app';
   return (
     <DocSearch appId={appId} apiKey={apiKey} indexName={indexName} transformItems={
       items => items.map(item => ({
         ...item,
-        url: item.url.replace('https://melodious-puffpuff-8e1109.netlify.app', ''),
+        url: item.url.replace(indexDomain, ''),
       }))
     } />
   );