Latest Hyrax won't run with Apache / Passenger

Hyrax beta2 introduces a new notifications feature using Action Cable.

Sadly this can't be supported with Apache and Passenger: https://www.phusionpassenger.com/library/config/apache/action_cable_integration/

Will need to figure out how to deal with this, either switching to nginx or doing the reverse proxy do dah in the above.

See phusion/passenger#1202

I have a way of doing this with puma / apache which MAY also work with passenger. Write this up for samvera documentation site (and add note to hyrax managers guide).