Put workhorse in it's own pod
Related to #50 (closed)
Once we have containerised workhorse, we can take extra steps to place it in its own pod.
Difficulties
We have to have a solution for shared storage right away in order to do this solution.
Benefits
1. Allows us to limit resources for unicorn and workhorse separately.
1. Allows us to scale workhorse and unicorn separately.
1. Keeps GitLab error pages up while unicorn pods are deploying. (potentially)
1. Keeping them separate, gives us the opportunity to at least explore workhorse being able to serve assets for multiple versions of unicorn as we try things like rolling deploys.