Added dockerfile to support runing tests in docker#5

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Spaceinvaderz wants to merge 2 commits intoFreeFeed:masterfrom

Spaceinvaderz:feature/dockerfile

Commits on Feb 19, 2021

Added dockerfile to support runing tests in docker and some minor changes described below:
aseledets
committed

Commits on Mar 17, 2021

Merge branch 'master' into feature/dockerfile
Spaceinvaderz
authored