logger

type Config struct {
	OutputPath    string
	MaxFileSizeMB int
	MaxBackups    int
	MaxAges       int
	Compress      bool
	LocalTime     bool
}

type Logger interface {
	Debugf(msg string, args ...interface{})
	Infof(msg string, args ...interface{})
	Warnf(msg string, args ...interface{})
	Errorf(msg string, args ...interface{})
	Level(level string)
	OutputPath(path string) (err error)
}