Document how nodes are added

[Jonathan Davies]

I'd like to have this node added to the map: https://www.openstreetmap.org/node/5702482205

But there's no documentation on how to do this/which OSM tags are needed for a node to be considered.

[midzer]

@jpds You're absolutely right. This repo lacks a proper README.md. I am going to write one the next days.

[midzer]

Done via 53851e2

@jpds Is this looking good for you?

[Jonathan Davies]

Amazing 👍