Risks of using django manage.py runserver for production in a small scale server, for internal use?
From the manage.py documentation:
DO NOT USE THIS SERVER IN A PRODUCTION SETTING. It has not gone through security audits or performance tests. (And that’s how it’s gonna stay.
That's all you need to know to make a decision on this.
If you're deploying a python web app, even for a low-load, internal-use only project, it is still very much worth the extra work to learn a proper way to host the application, as it's quite likely that you'll need to use those skills at some point in the future.