Fix formatting in healthcheck command for backend service in docker-compose.yml

Co-authored-by: Copilot <copilot@github.com>

docker-compose.yml

@@ -1,5 +1,3 @@
-version: '3.8'
-
 services:
   backend:
     build:
@@ -19,7 +17,7 @@ services:
     networks:
       - app-network
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:12000/health"]
+      test: [ "CMD", "curl", "-f", "http://localhost:12000/health" ]
       interval: 30s
       timeout: 10s
       retries: 3