Add a template doc for describing the projects High-Level architecture

[janhalen]

Add an Architecture Overview

Should include

• A diagram or description of the high-level architecture in a version controllable format

[janhalen]

I would recommend using Mermaid as the syntax/format for the diagram.

📚 Read more about Mermaid: https://docs.mermaidchart.com/mermaid/intro

[janhalen]

An early preliminary version of a mermaid formatted architectural diagram is worked on here: https://github.com/OS2offdig/os2-docs-template/blob/13-add-a-template-doc-for-describing-the-projects-high-level-architecture/docs/architecture.md

The colours are terrible.. i know 😄

[janhalen]

This could also be added to the README.md for more visibility..

The downside would be the space it takes up from other informations thus cluttering the README?

This could be solved by making a clear link to the diagram, and place it in a seperate "Architecture.md" - inspired by this article: https://johnjago.com/great-docs/