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
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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
-    name: regisflow_network
+    external: true
+    name: nginx_default