code: func init() {
  	root.Register(Command)
  
  	f := Command.Flags()
  	f.StringSliceVarP(&env, "set", "s", nil, "Set environment variable")
  	f.StringVarP(&envFile, "env-file", "E", "", "Set environment variables from JSON file")
  	f.StringVarP(&alias, "alias", "a", "current", "Function alias")
  	f.StringVarP(&zip, "zip", "z", "", "Zip path")
  	f.IntVarP(&concurrency, "concurrency", "c", 5, "Concurrent deploys")
  }
docs: // Initialize.