diff --git a/docker-compose.yml b/docker-compose.yml
index 72eef2f..7910cd0 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -146,7 +146,11 @@ services:
         env_file:
             - ./.env
         ports:
-            - "${AE_APP_NODE_PORT}:3000"
+            # Port range allows scaling: Docker assigns one host port per replica.
+            # e.g. AE_APP_NODE_PORT_RANGE=3001-3006 with AE_APP_REPLICAS=3 binds
+            # 3001→replica-1, 3002→replica-2, 3003→replica-3.
+            # Add matching ports to the external nginx upstream to enable them.
+            - "${AE_APP_NODE_PORT_RANGE:-3001-3001}:3000"
         extra_hosts:
             srv-nyx.oneskyit.com: "104.237.143.4"
             dev-app.oneskyit.com: "104.237.143.4"