How effortlessly connect applications as in docker-compose.yml

I have 3 apps, bot, app and static front-end. Locally I can open frontend on localhost, and send API requests to localhost/<api request>. But with Dokploy I need to use custom domains (traefik) for connect applications. For example, frontend sends request to back to <traefik/api_req>, not just to </api_req>. So, how I can connect applications like with docker-compose using Dokploy applications? By name especially