This repository contains just one add-on, an unofficial Node-RED add-on.
Add this repository to your Hass.io instance:
https://github.com/korylprince/hassio-node-red
If you have trouble you can follow the official docs.
Then install the "Node-RED" add-on.
See the node-red add-on itself for information on configuring it.
If you have an issue with this plugin, please file an issue.