logger

type Config struct {
	Level    string
	FilePath string
}

type Logger interface {
	Debug(format string)
	Debugf(format string, args ...interface{})
	Info(format string)
	Infof(format string, args ...interface{})
	Warn(format string)
	Warnf(format string, args ...interface{})
	Error(format string)
	Errorf(format string, args ...interface{})
	Fatalf(format string, args ...interface{})
	Panicf(format string, args ...interface{})
	WithFields(fields map[string]interface{}) Logger
}