Helm deployment instructions (README) include architecture diagrams

[boazmichaely]

Summary

The deployment instructions may be hard to follow without visuals. Adding a few diagrams that show the target deployment architecture would be very beneficial. For example -

1. pod layout showing which containers are used
2. networking diagram showing internal and external comm with ports

Note that some of these diagrams already exist elsewhere (ask @boazmichaely )

Expected Results

Users should be able to understand what they are building to start with, and verify that they have correctly built it at the end.