Add apache + mod_wsgi deployment documentation

Remove old deploying documentation as it was out of date.
Add Nginx to deployment.

refs #14949
Update references from deploying to deployment/intro

refs #14949
Fix links to deployment.
Add static directory to apache vhost.

refs #14949
Beginning of Nginx/uWSGI docs.

refs #14949
Update nginx conf and uwsgi conf for GWM.

refs #14949
Update nginx and uwsgi settings files for docs.

refs #14949
Add reference to apache conf file.

refs #14949
Add static files section to deployment/intro

refs #14949
Finish Nginx + uWSGI deployment doc

refs #14949
Remove getting_started/deploying in favor of new deploy docs.

refs #14949
Fix reference errors

refs #14949
Merge branch 'enhancement/14949' into develop

* enhancement/14949:
  Fix reference errors
  Remove getting_started/deploying in favor of new deploy docs.
  Finish Nginx + uWSGI deployment doc
  Add static files section to deployment/intro
  Add reference to apache conf file.
  Update nginx and uwsgi settings files for docs.
  Update nginx conf and uwsgi conf for GWM.
  Beginning of Nginx/uWSGI docs.
  Add static directory to apache vhost.
  Fix links to deployment.
  Update references from deploying to deployment/intro
  Add Nginx to deployment.
  Add apache + mod_wsgi deployment documentation
Add prod requirements to dev.txt