Bring reference architecture up to date #31

This issue is for a: (mark with an x)

- [ ] bug report -> please search issues before submitting
- [X] feature request
- [X] documentation issue or request
- [ ] regression (a behavior that used to work and stopped in a new release)

Minimal steps to reproduce

This reference architecture is really interesting but as with the ever increase in cadence of functionality in Azure it has fallen behind in services, SDK versions, best practices etc. and not been updated for 2 years. It would be really helpful if this reference architecture was updated to work with the latest functionality in Azure Functions etc. and best practices as required.

Thanks!