Use existing network to allow communication between containers

Configures docker-compose to use the existing external network "nginx_default" instead of creating a new bridge network.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: dec54137-d5a2-4406-8ad4-5f2f9fb110bf
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/0715008c-7244-40f4-befc-26c014852236/bffd17dd-5606-4906-a45b-fdd9f0336d07.jpg

docker-compose.yml

@@ -65,8 +65,8 @@ volumes:
   logs_data:
     driver: local
 
-# Réseau pour RegisFlow
+# Utilisation du réseau nginx_default existant
 networks:
   default:
-    driver: bridge
+    external: true
-    name: regisflow_network
+    name: nginx_default