code: func ProjectPort(p project.APIProject, c *cli.Context) error {
  	if len(c.Args()) != 2 {
  		return cli.NewExitError("Please pass arguments in the form: SERVICE PORT", 1)
  	}
  
  	index := c.Int("index")
  	protocol := c.String("protocol")
  	serviceName := c.Args()[0]
  	privatePort := c.Args()[1]
  
  	port, err := p.Port(context.Background(), index, protocol, serviceName, privatePort)
  	if err != nil {
  		return cli.NewExitError(err.Error(), 1)
  	}
  	fmt.Println(port)
  	return nil
  }
docs: // ProjectPort prints the public port for a port binding.