console formatter for logrus
defaultLogFormat = "%lvl% [ %time% ] %file% %func% => %msg%\n"
defaultTimestampFormat = "2006-01-02 15.04.05"
usage:
logrus.SetFormatter(&formatter.Formatter{
TimestampFormat: "2006-01-02 15.04.05",
LogFormat: "%lvl% [ %time% ] %file% %func% => %msg%\n",
})