logger

var (
	Log  *zap.Logger        // log to file and console
	Logf *zap.Logger        // log to file only
	Logc *zap.Logger        // log to console only
	Sug  *zap.SugaredLogger // log by Sugar to file and console
	Sugf *zap.SugaredLogger // log by Sugar to file only
	Sugc *zap.SugaredLogger // log by Sugar to console only
)

var (
	Level = zap.DebugLevel
)