Add node label constraint to service placement

- Add node label constraint
- Remove redundant constraint
- Update healthcheck start period
- Ensure consistent formatting
- Maintain overlay network driver

docker-compose.yml

@@ -57,13 +57,13 @@ services:
         max_attempts: 3
       placement:
         constraints:
+          - node.labels.reskreen-ready==true
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:3000/"]
       interval: 30s
       timeout: 10s
       retries: 3
-      start_period: 60s
-         - node.labels.reskreen-ready==true
+      start_period: 60s         
 networks:
   default:
     driver: overlay