diff --git a/env.example b/env.example
index f8a2fb3..70e17ef 100644
--- a/env.example
+++ b/env.example
@@ -1,3 +1,6 @@
+# Domain of service
+DOMAIN=mm.example.com
+
 # Container settings
 ## Timezone inside the containers. The value needs to be in the form 'Europe/Berlin'.
 ## A list of these tz database names can be looked up at Wikipedia
@@ -34,8 +37,8 @@ NGINX_DHPARAMS_FILE=./nginx/dhparams4096.pem
 
 CERT_PATH=./volumes/web/cert/cert.pem
 KEY_PATH=./volumes/web/cert/key-no-password.pem
-#CERT_PATH=./certs/etc/letsencrypt/live/mm.example.com/fullchain.pem
-#KEY_PATH=./certs/etc/letsencrypt/live/mm.example.com/privkey.pem
+#CERT_PATH=./certs/etc/letsencrypt/live/${DOMAIN}/fullchain.pem
+#KEY_PATH=./certs/etc/letsencrypt/live/${DOMAIN}/privkey.pem
 
 ## Exposed ports to the host. Inside the container 80 and 443 will be used
 HTTPS_PORT=443
@@ -68,4 +71,4 @@ MM_SQLSETTINGS_DRIVERNAME=postgres
 MM_SQLSETTINGS_DATASOURCE=postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@postgres:5432/${POSTGRES_DB}?sslmode=disable&connect_timeout=10
 
 ## Example settings (any additional setting added here also needs to be introduced in the docker-compose.yml)
-MM_SERVICESETTINGS_SITEURL=https://mm.example.com
+MM_SERVICESETTINGS_SITEURL=https://{DOMAIN}