Add FAQ on shm-size and add Dockerfile setuptools upgrade

[tijyojwad]

@ntadimeti can you also upload this dockerfile to dockerhub?

[ntadimeti]

@tijyojwad I think Dockerfile is only shown on docker hub if we hookup our github account and trigger automatic builds from dockerhub : https://stackoverflow.com/questions/54435543/how-to-upload-dockerfile-to-dockerhub

Correct me if I'm missing something

[tijyojwad]

My apologies, I meant can you upload the docker image associated with this fixed up dockerfile to the hub

[ntadimeti]

The docker image associated with these changes is already uploaded with latest and 0.2.0 tags. These changes were made inorder to upload those images around a month ago :)