I'm trying to map out the data model and communications between the front and backend of an app. This will be given to two system architects for the purpose of designing a backend architecture and porting my work into a cloud architecture. Up until now I've written the app alone and very rapidly so it's not very well-defined in terms of classes, and I'm not very familiar with formal documentation systems like UML.
Here's how it works:
I'd like to know what the appropriate way would be of representing the following:
All of these seem like they'd be relevant to the process, but I am unsure of what sort of collection of diagrams would be the best way forward.