networks:
  # Second network Traefik also listens on, so a service can be routed WITHOUT
  # sitting on `chains` next to the RPC nodes, Redis and the Traefik API (a
  # public-facing site next to unauthenticated :8545 endpoints is a foothold we
  # do not want to hand out). Overridable per host via TRAEFIK_EXTRA_NETWORK;
  # the default is an empty bridge, so hosts that do not use it are unaffected.
  extra:
    name: ${TRAEFIK_EXTRA_NETWORK:-rpc_extra}
  chains:
    driver: bridge
    ipam:
     config:
       - subnet: ${CHAINS_SUBNET:-192.168.0.0/26}