This mindmap is hosted here.
To add to or edit the mindmap, have a look at the data.yml file. It is made up of nodes - the single elements - that all start from the root node.
Node can contain four elements: text, description, URL and children. Text is required to actually be able to display the node, while children and URL are optional. If children is set, these child nodes will be connected to their parent, if URL is set, the node will contain a link to that URL.
Use children to break apart a point and use the URL if there is a source of information for that specific topic, or it otherwise makes sense.
Use the description field to add additional information that is shown when hovering over the node.