Fix Angular environment config

Author: janheinrichmerker

browser/src/environments/environment.ts

@@ -1,6 +1,6 @@
 export const environment = {
   production: true,
   // Assume that both the API and web app are routed on the same hostname.
-  apiUrl: '/api',
+  apiUrl: '/',
   apiTimeout: 60000,
 };