I set up an Nginx server in front of my Vue frontend and my Node backend. Nginx redirects to requets to Vue and the browser shows the page. But when I want to log in (call the backend API), nothing happens. I assume that the backend is not reachable. I configured the axios backend call like so http://localhost:8080/api“ for the backend. Do I assume it correctly that "behind” the reverse proxy, the servers can communicate via localhost with eachother?