This repository contains just one add-on, an unofficial Caddy add-on.
Add this repository to your Hass.io instance:
https://github.com/Michsior14/hassio-caddy
If you have trouble you can follow the official docs.
Then install the "Caddy" add-on.
See the Caddy add-on itself for information on configuring it.
If you have an issue with this plugin, please file an issue.