docs: def main(argv=None):
      """Entry point for the `simpl` command."""
      #
      # `simpl server`
      #
      logging.basicConfig(level=logging.INFO)
      server_func = functools.partial(server.main, argv=argv)
      server_parser = server.attach_parser(default_subparser())
      server_parser.set_defaults(_func=server_func)
  
      # the following code shouldn't need to change when
      # we add a new subcommand.
      args = default_parser().parse_args(argv)
      args._func()