A custom log formatter doesn't work with this info from formatter.go. Used entry.Time, entry.Level, entry.Message instead.
// * `entry.Data["msg"]`. The message passed from Info, Warn, Error ..
// * `entry.Data["time"]`. The timestamp.
// * `entry.Data["level"]. The level the entry was logged at.
A custom log formatter doesn't work with this info from formatter.go. Used entry.Time, entry.Level, entry.Message instead.