Connect application to external network for improved deployment flexibility

Removes the internal regisflow_network and configures the docker-compose.yml to use the external nginx_default 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-26c014852236/5d315300-98fa-429a-abb0-4fdce6a2e3c9.jpg

docker-compose.yml

@@ -7,8 +7,6 @@ services:
   regisflow-db:
     image: postgres:15-alpine
     container_name: regisflow-db
-    networks:
-      - regisflow_network
     environment:
       POSTGRES_DB: regisflow
       POSTGRES_USER: regisflow
@@ -34,8 +32,6 @@ services:
       args:
         - NODE_ENV=production
     container_name: regisflow-app
-    networks:
-      - regisflow_network
     depends_on:
       regisflow-db:
         condition: service_healthy
@@ -72,8 +68,8 @@ volumes:
   logs_data:
     driver: local
 
-# Configuration réseau flexible pour déploiement
+# Utilisation du réseau nginx_default existant
 networks:
-  regisflow_network:
-    driver: bridge
-    name: regisflow_network
+  default:
+    external: true
+    name: nginx_default