mkdir & add fails

[pushpdeep]

Thanks for the nice tutorial and the demo repo.

The mkdir for nginx failed and the add /static failed as well.

1. the mkdir issue was resolved by following this link ( -p to be added before the path )
   https://stackoverflow.com/questions/30741995/cannot-execute-run-mkdir-in-a-dockerfile

2. the Dockerfile of nginx fails to add static, as its in the parent directory. To make it work, i copied the static folder from the parent folder into the nginx directory. The nginx dockerfile doesnt has permission to read the files of the parent dir.

I have posting the issues, in case anyone faces it as well.

By the way, I tried fixing the bad 400 request, by adding * and localhost address to the settings.py and rebuilding again. it still did not work.