working test deploy config

docker-compose.prod.yml

@@ -14,6 +14,8 @@ services:
 
   frontend:
     environment:
-      # Point to your API's production URL
+      # Internal API target for nginx proxy
       API_UPSTREAM: https://api.yourdomain.com
+      # Browser-facing API URL. Empty = proxy mode. Set to direct URL if ingress breaks proxy chain.
+      API_PUBLIC_URL: ""
     # No port mapping — traffic arrives via reverse proxy / load balancer