Create an end-to-end guide for working on single application under minikube

[`/admin/README.md`](https://github.com/CodeForPhilly/civic-cluster/blob/master/admin/README.md) covers the main ansible commands, including to deploy a single application, but it assumes the user is starting from our private bastion environment that already has ansible setup.

Create an end-to-end guide that someone already familiar with kubernetes and docker, but not ansible, could follow to get into a single-app-deploy dev loop from having a fresh minikube instance running locally