A functional specification describes how a product will work entirely from the user's perspective. It doesn't care how the thing is implemented. It talks about features. It specifies screens, menus, dialogs, and so on - joelonsoftware.com 
# Overview Here we write a one-line summary of the step-project:
# Examples
This is like the table of contents for your spec. It might be a simple flowchart, or it might be an extensive architectural discussion. Everybody will read this to get the big picture, then the details will make more sense.
Between April and July 2019 we aim to bootstrap this project through creating a single minimal, containerised server that provides minimal viable governance for cooperatives and not-for-profit groups.