instruction: Create a comprehensive Dockerfile for networking applications with best practices
output: ```dockerfile
  from a network, use the --network-rm flag.
  
  $ docker service update --network-rm my-network my-web
  For more information on overlay networking and service discovery, refer to
  Attach services to an overlay network and
  Docker swarm mode overlay network security model.Grant a service access to secretsTo create a service with access to Docker-managed secrets, use the --secret
  flag. For more information, see
  Manage sensitive strings (secrets) for Docker servicesCustomize a service's isolation mode
  ImportantThis setting applies to Windows hosts only and is ignored for Linux hosts.Docker allows you to specify a swarm service's isolation
  mode. The isolation mode can be one of the following:default: Use the default isolation mode configured for the Docker host, as
  configured by the -exec-opt flag or exec-opts array in daemon.json. If
  the daemon does not specify an isolation technology, process is the default
  for Windows Server, and hyperv is the default (and only) choice for
  Windows 10.process: Run the service tasks as a separate process on the host.
  Noteprocess isolation mode is only supported on Windows Server.
  Windows 10 only supports hyperv isolation mode.hyperv: Run the service tasks as isolated hyperv tasks. This increases
  overhead but provides more isolation.You can specify the isolation mode when creating or updating a new service using
  the --isolation flag.Control service placementSwarm services provide a few different ways for you to control scale and
  placement of services on different nodes.You can specify whether the service needs to run a specific number of replicas
  or should run globally on every worker node. See
  Replicated or global services.You can configure the service's
  CPU or memory requirements, and the
  service only runs on nodes which can meet those requirements.Placement constraints let you configure the service
  to run only on nodes with specific (arbitrary) metadata set, and cause the
  deployment to fail if appropriate nodes do not exist. For instance, you can
  specify that your service should only run on nodes where an arbitrary label
  pci_compliant is set to true.Placement preferences let you apply an arbitrary
  label with a range of values to each node, and spread your service's tasks
  across those nodes using an algorithm. Currently, the only supported algorithm
  is spread, which tries to place them evenly. For instance, if you
  label each node with a label rack which has a value
  ```