Duo Workflow service deployment for Self Hosted Duo

To use Duo Workflow in Self-Hosted mode, Duo Workflow Service must be running. This service is part of AIGW, but it is a different GRPC running that would run on a different port.

Investigate:

• Can the same docker image of self-hosted AIGW be used to run DWS? Can the same docker image support running 2 servers in 2 different ports?
• How will this work with helm chart?

It is possible that just specifying ENABLE_DUO_WORKFLOW_SERVICE=true on docker run would be enough to make this work, due to how run.sh is configured.