Use cases for drogue cloud

[lulf]

Just a WIP with an idea for some example use cases. Currently only a high level description of each use case, but let's agree on the example use cases to present first. In every case I'd like to add:

• An architecture diagram with the high level architecture of the Drogue Cloud deployment and additional services and the different environments where components are deployed
• Modelling applications and devices in Drogue Cloud
• A description of telemetry flow from device to application and back and the application logic
• Describing additional services relevant to the use case like digital twin, edge workload management or firmware updates.

[danbev]

This looks great!

Is the "correct" way to generate the docs by using book.drogue.io and then make local?

[lulf]

@danbev Yes, that's the way. You need to have drogue-cloud and drogue-device (maybe also embassy) checked out in the same parent folder as book.drogue.io.