✨ Pass clientExtensions to Ghost Admin (#8617)

no issue

- pass through this additional config if it exists

core/server/api/configuration.js

@@ -30,7 +30,8 @@ function getBaseConfig() {
         publicAPI:      config.get('publicAPI') === true,
         blogUrl:        utils.url.urlFor('home', true),
         blogTitle:      settingsCache.get('title'),
-        routeKeywords:  config.get('routeKeywords')
+        routeKeywords:  config.get('routeKeywords'),
+        clientExtensions: config.get('clientExtensions')
     };
 }