fix(staging): use RFC-compliant najm-backend alias to prevent Django 400 Bad Request

docker-compose.staging.yml

@@ -16,7 +16,7 @@ services:
     environment:
       - NODE_ENV=production
       - NEXT_PUBLIC_API_BASE_URL=https://habib.nwhco.ir
-      - API_BASE_URL=http://najm_staging_web:8000
+      - API_BASE_URL=http://najm-backend:8000
       - NEXT_PUBLIC_SECURITY_KEY=t5yugymks5458fd4ghfg6h6fg
     healthcheck:
       test: ["CMD", "wget", "-qO-", "http://127.0.0.1:3000/healthz"]
@@ -25,7 +25,9 @@ services:
       retries: 3
       start_period: 15s
     networks:
-      - najm_staging_net
+      najm_staging_net:
+        aliases:
+          - marriage-staging-web
 
 networks:
   najm_staging_net: