fix: add application to trackjs

Author: markw-deriv

src/theme/Root.tsx

@@ -14,7 +14,10 @@ type TRootProps = {
 };
 
 if (siteConfig.customFields.trackJsToken) {
-  TrackJS.install({ token: siteConfig.customFields.trackJsToken.toString() });
+  TrackJS.install({
+    application: 'api.deriv.com',
+    token: siteConfig.customFields.trackJsToken.toString(),
+  });
 } else {
   console.warn('trackjs is not installed due to a missing token');
 }