config

type Config interface {
	Get(key string) interface{}
	GetBool(key string) bool
	GetInt(key string) int
	GetFloat(key string) float64
	GetString(key string) string
	GetTime(key string) time.Time
	GetDuration(key string) time.Duration
	GetViper() *viper.Viper
	Has(key string) bool
	Sub(key string) Config
	AddObserver(o Observer)
	AddObserverFunc(f func(Config, chan error))
	Dump() string
	Exist() bool
}

type Observer struct {
	Run func(Config, chan error)
}