diff --git a/docker-compose.yml b/docker-compose.yml
index 172f7a8..0d7be7f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -178,7 +178,7 @@ services:
     command:
       - export FRAPPE_SITE_NAME_HEADER=$$(tr -d '\r\n' < /home/frappe/frappe-bench/sites/currentsite.txt); exec nginx-entrypoint.sh
     environment:
-      - SERVICE_FQDN_FRONTEND_8080
+      - SERVICE_URL_FRONTEND_8080
       - 'BACKEND=backend:8000'
       - 'SOCKETIO=websocket:9000'
       - 'UPSTREAM_REAL_IP_ADDRESS=${UPSTREAM_REAL_IP_ADDRESS:-127.0.0.1}'
diff --git a/docs/COOLIFY_DEPLOY.md b/docs/COOLIFY_DEPLOY.md
index 06fda5c..ad90376 100644
--- a/docs/COOLIFY_DEPLOY.md
+++ b/docs/COOLIFY_DEPLOY.md
@@ -80,7 +80,7 @@ Login: `https://your-domain` — user `Administrator`, password = `ADMIN_PASSWOR
 
 | Symptom | Fix |
 |---------|-----|
-| Traefik `404 page not found` / URL unreachable | Domain must be on service `frontend` port **8080**; app `ports_exposes` must be 8080 not 3000 |
+| Traefik `404 page not found` / URL unreachable | Domain on service `frontend` port **8080**; compose must declare `SERVICE_URL_FRONTEND_8080` (not `SERVICE_FQDN_*`); `ports_exposes` = 8080 |
 | Backend unhealthy / deploy fails after migrator | Healthcheck must send `Host: <site>` — fixed in compose; redeploy |
 | `SITE_NAME empty` on create-site | Assign domain on `frontend:8080` before deploy (`SERVICE_FQDN_FRONTEND`) |
 | Wrong site / 404 nginx | Delete old `SITE_NAME` in Coolify UI; ensure header matches domain |
diff --git a/scripts/ci/validate-docker-compose.sh b/scripts/ci/validate-docker-compose.sh
index 52cdfe6..7f6b2d5 100755
--- a/scripts/ci/validate-docker-compose.sh
+++ b/scripts/ci/validate-docker-compose.sh
@@ -60,10 +60,10 @@ else
 fi
 
 # SERVICE_FQDN on frontend with port 8080 (Frappe nginx default; Coolify Traefik target)
-if grep -q 'SERVICE_FQDN_FRONTEND_8080' "$COMPOSE_FILE"; then
-  pass "[DC-03] SERVICE_FQDN_FRONTEND_8080 present"
+if grep -q 'SERVICE_URL_FRONTEND_8080' "$COMPOSE_FILE"; then
+  pass "[DC-03] SERVICE_URL_FRONTEND_8080 present (Traefik → nginx:8080)"
 else
-  err "[DC-03] missing SERVICE_FQDN_FRONTEND_8080 on frontend"
+  err "[DC-03] missing SERVICE_URL_FRONTEND_8080 on frontend"
 fi
 
 if grep -q 'SERVICE_FQDN_FRONTEND' "$COMPOSE_FILE"; then