diff --git a/docker-compose.yml b/docker-compose.yml
index ebbb0eb..fefe559 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -146,8 +146,9 @@ services:
         scale: ${AE_APP_REPLICAS:-1}
         env_file:
             - ./.env
-        ports:
-            - "${AE_APP_NODE_PORT}:3000"
+        # No host port mapping — nginx routes to ae_app:3000 on the internal network.
+        # With scale > 1, all replicas share the same service name and Docker
+        # round-robins between them. A static host port would conflict.
         extra_hosts:
             srv-nyx.oneskyit.com: "104.237.143.4"
             dev-app.oneskyit.com: "104.237.143.4"