Implement docker system commands

[bkuzmic]

Implement docker system commands as in docs:
https://docs.docker.com/engine/reference/commandline/system/

[0crat]

@amihaiemil/z please, pay attention to this issue

[0crat]

@bkuzmic/z this project will fix the problem faster if you donate a few dollars to it; just click here and pay via Stripe, it's very fast, convenient and appreciated; thanks a lot!

[amihaiemil]

@bkuzmic I think you are referring to the System API. Yes, it makes sense :)

[0crat]

Job #194 is now in scope, role is DEV

[0crat]

Bug was reported, see §29: +15 point(s) just awarded to @bkuzmic/z

[0crat]

The job #194 assigned to @bkuzmic/z, here is why; the budget is 30 minutes, see §4; please, read §8 and §9; if the task is not clear, read this and this; there will be no monetary reward for this job

[0crat]

It is strongly discouraged to assign jobs to their creators, see §19: -15 point(s) just awarded to @amihaiemil/z

[0crat]

Manual assignment of issues is discouraged, see §19: -5 point(s) just awarded to @amihaiemil/z