Add workflow for blue-green deployments (#148)
Add workflow for blue-green deployments (#148)

* Add prototype script and temp README

* Clean up code and support command-line args

* Flesh out logic more now

* Start workflow

* Update Blue-Green workflow

* Rm original example script

* Update comments

* Add argo parameters; use compact output for jq

* Fix some missing values, use workflow parameters

* Separate out necessary parameters/outputs

* Get bluegreen workflow working

* Mv bluegreen.yaml to workflows/, thanks @jessesuen

* Rm TODO statements

argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd,argoproj/argo-cd