instruction: Create a Dockerfile for networking
output: ```dockerfile
  from the container's network namespace so, for example, --dns=127.0.0.1 refers to the container's own loopback address.--dns-searchA DNS search domain to search non-fully qualified hostnames. To specify multiple DNS search prefixes, use multiple --dns-search flags.--dns-optA key-value pair representing a DNS option and its value. See your operating system's documentation for resolv.conf for valid options.--hostnameThe hostname a container uses for itself. Defaults to the container's ID if not specified.Custom hostsYour container will have lines in /etc/hosts which define the hostname of the
  container itself, as well as localhost and a few other common things. Custom
  hosts, defined in /etc/hosts on the host machine, aren't inherited by
  containers. To pass additional hosts into a container, refer to
  add entries to
  container hosts file in the
  docker run reference documentation.Proxy serverIf your container needs to use a proxy server, see
  Use a proxy server.
  Request changesTable of contentsUser-defined networksDriversConnecting to multiple networksContainer networksPublished portsIP address and hostnameDNS servicesCustom hostsProxy server
  
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