implement X-Accel-Redirect to handle files

[ajurna]

I'm submitting a ...

• bug report
• feature request
• support request => Please do not submit support request here, see note at the top of this template.

What is the current behavior?
currently python handles a lot of the file transfers.

What is the motivation / use case for changing the behavior?
using this i could protect the thumbnails from unauthenticated access and also transfer pdf's using this instead of streaming them via DRF.

[ajurna]

https://www.nginx.com/resources/wiki/start/topics/examples/x-accel/
https://wellfire.co/learn/nginx-django-x-accel-redirects/