Add documentation for a single node cluster

[mrueg]

Describe the solution you'd like:

For starters using this project it might be easiest to run this on a single node to become familiar with it.
The README could be extended to describe what they'd need to do in order to run it on a single node (e.g. specific settings around control plane, simplifying networking, etc.)

[onedr0p]

I'm not against it, having more options presented to the user might be a good or bad thing haha.

[onedr0p]

Closing in favor of #115

[onedr0p]

And added in 85a26f6