diff --git a/README.md b/README.md
index 3171104..fbff48d 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,8 @@ Optional: other path `sudo RUBIX_INSTALL_PATH=/opt/rubix ./install-rubix.sh`
 
 ## 2) Configure `.env` and start stack
 
+While editing `.env`, set your domain values (`RUBIX_DOMAIN_CMS`, API/DB/Mail hosts, aliases) and make sure DNS A/AAAA records for those hosts point to this server (manage records at your registrar/DNS provider).
+
 ```bash
 cd /home/www/callcenter/deploy/docker
 cp .env.example .env