Add LOG_STDOUT support

[mhmdksh]

This is meant to lessen the development burden to support Elastic Logging natively by the application or any direct centralized logging solution

Take into consideration the below:

• Logs are written to STDOUT & STDERR instead of a file
• This should be optional (We are only using this on demand, and specific use case, ex: Kubernetes for centralised logging)
• The application should not crash in case there is no .log file and this option is enabled (We should not create a volume in k8s to hold the .log file just for the application to start successfully)

Check this for reference: Giveth/impact-graph@0f06e0a

[MoeNick]

What should we do with this issue?
Does this one (#60) need to be reviewed by @mohammadranjbarz ?

FYI: @divine-comedian