Update Traefik network name to traefik-net

Rename external network from 'traefik' to 'traefik-net' for consistency with Traefik network naming conventions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

docker-compose.yml

@@ -20,7 +20,7 @@ services:
       - "traefik.http.services.${COMPOSE_PROJECT_NAME}.loadbalancer.server.port=80"
     networks:
       - walter-coiffure-net
-      - traefik
+      - traefik-net
   db:
     image: mariadb:latest
     restart: always
@@ -47,7 +47,7 @@ services:
 networks:
   walter-coiffure-net:
     driver: bridge
-  traefik:
+  traefik-net:
     external: true
 volumes:
   wordpress: