Replace gunicorn with uWSGI as NetBox's default WSGI service

[jeremystretch]

Change Type

Addition

Area

Installation/upgrade

Proposed Changes

In light of recent issues with gunicorn that don't seem likely to be resolved soon, I wanted to float the idea of replacing gunicorn with uWSGI in NetBox's reference deployment stack. This would not effect any changes to NetBox itself, but would modify the installation & upgrade documentation and replace the reference gunicorn config.

For more context around the proposed change, please see discussion #14780. (Thank you @markkuleinio and @tyler-8 for sharing your experiences!)