Traefik: Move to host mode

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

@@ -33,8 +33,8 @@ services:
       - "prometheus-scrape.port=8080"
     networks:
       - backend
-      - gateway
       - pantalaimon
+      - default
 
   db:
     image: postgres:13
@@ -59,9 +59,6 @@ volumes:
 networks:
   backend:
     internal: true
-  gateway:
-    external: true
-    name: gateway
   pantalaimon:
     external: true
 ...