logger

var (
	// Level specifies verbosity level in string form
	// Available levels are:
	// "panic"
	// "fatal"
	// "error"
	// "warn", "warning"
	// "info"
	// "debug"
	// "trace"
	Level string

	// Formatter specifies log format
	// Available formatters are:
	// "json"
	// "text", "txt"
	Formatter string
)