Docker Task Handler (Code isolation/Containerization)

[ramn51]

Currently scripts run directly and it needs isolation for security. So this is needed on priority.

[rudrat0319]

@ramn51 I'd like to take this on. can u pls assign it to me

[ramn51]

Assigned thanks. I still need to add docs to the files but for flow you can consider this Base flow of
SchedulerServer -> Scheduler -> RpcWorkerServer -> TaskHandler