instruction: Create a comprehensive Dockerfile for networking applications with best practices
output: ```dockerfile
  from the swarm.You need to have the brctl application installed on your operating system in
  order to delete an existing bridge. The package name is bridge-utils.Stop Docker.Use the brctl show docker_gwbridge command to check whether a bridge
  device exists called docker_gwbridge. If so, remove it using
  brctl delbr docker_gwbridge.Start Docker. Do not join or initialize the swarm.Create or re-create the docker_gwbridge bridge with your custom settings.
  This example uses the subnet 10.11.0.0/16. For a full list of customizable
  options, see
  Bridge driver options.
  
  $ docker network create \
  --subnet 10.11.0.0/16 \
  --opt com.docker.network.bridge.name=docker_gwbridge \
  --opt com.docker.network.bridge.enable_icc=false \
  --opt com.docker.network.bridge.enable_ip_masquerade=true \
  docker_gwbridge
  Initialize or join the swarm.Use a separate interface for control and data trafficBy default, all swarm traffic is sent over the same interface, including control
  and management traffic for maintaining the swarm itself and data traffic to and
  ```