Documentation for deploying CFCR with Calico

[spirrello]

Is your feature request related to a problem? Please describe.
Today CFCR is only deployed with Flannel but we're in need of using Calico for creating network policies to use CFCR in PCI compliant environments.

Describe the solution you'd like
It would be great to either include an option within the CFCR deployment process to select which network plugin to use or post a README for doing so.

Describe alternatives you've considered
Alternative described above.

Additional context
Using network policies is essential for deploying Kubernetes clusters and this should be available.

[obeyler]

+1