diff --git a/docker-compose.yml b/docker-compose.yml
index da7d6d9..340cba7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -19,11 +19,11 @@ services:
       FLASK_SECRET_KEY: ${FLASK_SECRET_KEY:-}
       CHAT_CLIENT_HASH_KEY: ${CHAT_CLIENT_HASH_KEY:-}
       PRIVATE_ACCESS_KEY: ${PRIVATE_ACCESS_KEY:-}
-
-      # VPS2 helper integration
       CALLS_BASE: ${CALLS_BASE:-https://calls.backend-3.com}
       CALL_HELPER_SHARED_SECRET: ${CALL_HELPER_SHARED_SECRET:-}
       CALL_TOKEN_TTL_SECONDS: ${CALL_TOKEN_TTL_SECONDS:-60}
+      # set CALLS_BASE to turn server config
+      # helper/.env
 
     volumes:
       - chat_data:/app/data
@@ -43,8 +43,10 @@ services:
       retries: 3
       start_period: 20s
     labels:
-      caddy: angel.33.backend-3.com
+      caddy: ${DOMAIN_URL:-angel.33.backend-3.com}
       caddy.reverse_proxy: "{{upstreams 5000}}"
+      # set DOMAIN_URL to domain 
+      # .env
 
 volumes:
   chat_data: