chore: mention Home Assistant in Setup instructions

Author: Blaimi

README.md

@@ -195,6 +195,10 @@ This readme and the [docs/](docs/) directory are **versioned** to match the prog
     - You can update the image with `docker pull ghcr.io/qdm12/ddns-updater`
     - You can set your JSON configuration as a single environment variable line (i.e. `{"settings": [{"provider": "namecheap", ...}]}`), which takes precedence over config.json. Note however that if you don't bind mount the `/updater/data` directory, there won't be a persistent database file `/updater/updates.json` but it will still work.
 
+### Home Assistant
+
+To install ddns-updater on [Home Assistant](https://home-assistant.io/), follow the installation instructions on [ha-ddns-updater](https://github.com/ha-ddns-updater/ha-ddns-updater/).
+
 ## Configuration
 
 Start by having the following content in *config.json*, or in your `CONFIG` environment variable: