ports 636:636 instead of 639:639

example/docker-compose.yml

@@ -36,7 +36,7 @@ services:
       - /container/service/slapd/assets/certs/
     ports:
       - "389:389"
-      - "639:639"
+      - "636:636"
     hostname: "example.org"
   phpldapadmin:
     image: osixia/phpldapadmin:latest