Add documentation

[hacker-h]

Add more documentation to the project please. E.g. how could I implement the following command into python using the nsenter module?: nsenter -t 1 --wd=/usr/local/bin -m -- docker ps

[hacker-h]

Essential Parts of the documentation are docs and example code. ( positive example repo: https://github.com/kubernetes-client/python/tree/master/kubernetes )