code: func KillCommand(factory app.ProjectFactory) cli.Command {
  	return cli.Command{
  		Name:   "kill",
  		Usage:  "Force stop service containers",
  		Action: app.WithProject(factory, app.ProjectKill),
  		Flags: []cli.Flag{
  			cli.StringFlag{
  				Name:  "signal,s",
  				Usage: "SIGNAL to send to the container",
  				Value: "SIGKILL",
  			},
  		},
  	}
  }
docs: // KillCommand defines the libcompose kill subcommand.