15154 Add uWSGI as option to gunicorn (#15550)

* 15154 uwsgi docs

* 15154 uwsgi contrib files

* 15154 review comments - merge nginx conf

* Restructure gunicorn/uWSGI installation docs

---------

Co-authored-by: Jeremy Stretch <jstretch@netboxlabs.com>

contrib/uwsgi.ini

@@ -0,0 +1,18 @@
+[uwsgi]
+; bind to the specified UNIX/TCP socket and port (usually localhost)
+socket = 127.0.0.1:8001
+
+; fail to start if any parameter in the configuration file isn’t explicitly understood by uWSGI.
+strict = true
+
+; re-spawn and pre-fork workers
+master = true
+
+; clear environment on exit
+vacuum = true
+
+; exit if no app can be loaded
+need-app = true
+
+; do not use multiple interpreters
+single-interpreter = true