This mindmap is hosted here.
To add to or edit the mindmap, have a look at the /src/data.yml file. It is made up of nodes - the single elements - that all start from the root node.
Node can contain five elements: text, description, URL, image and children. Text is required to actually be able to display the node, while all other fields 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. If an image is given, it will be shown with the node.
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.