CheckEnvVars checks if all the specified environment variables are set.

ConvertBytes converts bytes to a human-readable string with the appropriate unit (bytes, MiB, or GiB).

CronNextTime returns cronExpression next time.

Error logs error messages.

FileExists checks if the file does exist.

Info returns info log.

IsValidCronExpression verify cronExpression and returns boolean.

MakeDir create directory.

MakeDirAll create directory.

TimeFormat returns the format of the time.

Warn returns warning log.