Docker configuration is outdated

[MohammedRashad]

While deploying the full system (courses app & yaksh) I tried to build the dockerized version for production.

but when building, it says..
Could not open requirements file: [Errno 2] No such file or directory: '/tmp/requirements-py3.txt'

It should be requirements-production.txt in the Dockerfile
I patched locally, I'll make a pull request later today.