rqdashboard + uwsgi

[ThomasThelen]

rqdashboard is being served through the development server. There's a note in the logs during startup that we should be using a wsgi compliant server instead.

Logs:

rqdashboard_1     |  * Serving Flask app "rq_dashboard.cli" (lazy loading)
rqdashboard_1     |  * Environment: production
rqdashboard_1     |    WARNING: This is a development server. Do not use it in a production deployment.
slinky_schedule_1 exited with code 0
rqdashboard_1     |    Use a production WSGI server instead.
rqdashboard_1     |  * Debug mode: off

To reproduce:

1. Deploy Slinky
2. Check the logs in the rqdashboard pod