instruction: Create a comprehensive Dockerfile for networking applications with best practices
output: ```dockerfile
  from any communications external to that network. Since
  network isolation is tightly coupled to the network's parent interface the result
  of leaving the -o parent= option off of a docker network create is the exact
  same as the --internal option. If the parent interface is not specified or the
  --internal flag is used, a netlink type dummy parent interface is created
  for the user and used as the parent interface effectively isolating the network
  completely.The following two docker network create examples result in identical networks
  that you can attach container to:
  
  # Empty '-o parent=' creates an isolated network
  $ docker network create -d ipvlan \
   --subnet=192.168.10.0/24 isolated1
  
  # Explicit '--internal' flag is the same:
  $ docker network create -d ipvlan \
   --subnet=192.168.11.0/24 --internal isolated2
  
  # Even the '--subnet=' can be left empty and the default
  # IPAM subnet of 172.18.0.0/16 will be assigned
  $ docker network create -d ipvlan isolated3
  
  $ docker run --net=isolated1 --name=cid1 -it --rm alpine /bin/sh
  $ docker run --net=isolated2 --name=cid2 -it --rm alpine /bin/sh
  $ docker run --net=isolated3 --name=cid3 -it --rm alpine /bin/sh
  
  # To attach to any use `docker exec` and start a shell
  $ docker exec -it cid1 /bin/sh
  $ docker exec -it cid2 /bin/sh
  $ docker exec -it cid3 /bin/sh
  IPvlan 802.1Q trunk L2 mode example usageArchitecturally, IPvlan L2 mode trunking is the same as Macvlan with regard to
  gateways and L2 path isolation. There are nuances that can be advantageous for
  CAM table pressure in ToR switches, one MAC per port and MAC exhaustion on a
  host's parent NIC to name a few. The 802.1Q trunk scenario looks the same. Both
  modes adhere to tagging standards and have seamless integration with the physical
  network for underlay integration and hardware vendor plugin integrations.Hosts on the same VLAN are typically on the same subnet and almost always are
  grouped together based on their security policy. In most scenarios, a multi-tier
  application is tiered into different subnets because the security profile of each
  process requires some form of isolation. For example, hosting your credit card
  processing on the same virtual network as the frontend webserver would be a
  regulatory compliance issue, along with circumventing the long standing best
  practice of layered defense in depth architectures. VLANs or the equivocal VNI
  (Virtual Network Identifier) when using the Overlay driver, are the first step
  in isolating tenant traffic.
  The Linux sub-interface tagged with a VLAN can either already exist or will be
  created when you call a docker network create. docker network rm will delete
  the sub-interface. Parent interfaces such as eth0 are not deleted, only
  sub-interfaces with a netlink parent index > 0.For the driver to add/delete the VLAN sub-interfaces the format needs to be
  interface_name.vlan_tag. Other sub-interface naming can be used as the
  specified parent, but the link will not be deleted automatically when
  docker network rm is invoked.The option to use either existing parent VLAN sub-interfaces or let Docker manage
  them enables the user to either completely manage the Linux interfaces and
  networking or let Docker create and delete the VLAN parent sub-interfaces
  (netlink ip link) with no effort
  ```