Traefik: Move to host mode

coreos-config/plays/services/registry/docker-compose.yaml

@@ -10,7 +10,6 @@ services:
       - "traefik.http.services.registry.loadbalancer.server.port=5000"
     image: 'registry:2'
     networks:
-      - gateway
       - backend
     volumes:
       - registry_data:/var/lib/registry
@@ -34,7 +33,6 @@ services:
       - "traefik.http.routers.registry-auth.middlewares=registry-auth-headers"
     networks:
       - backend
-      - gateway
     volumes:
       - ./auth_config.yaml:/config/auth_config.yaml:ro,Z
       - ./server.pem:/server.pem:ro,Z
@@ -44,8 +42,6 @@ volumes:
   registry_data:
 
 networks:
-  gateway:
-    external: true
   backend:
     internal: true
 ...