Update README.md

Added description about HACS installation

README.md

@@ -11,9 +11,23 @@ The component has been developed and tested with an Epson LS12000 projector, but
 
 ## Installation
 
+**HACS**
+
+1. In HACS, select `Integrations`
+2. Select `Custom Repositories` from the three dots in top right corner
+3. Enter `https://github.com/TheRealKillaruna/ha-pjlink2` as repository and select `Integration` as category
+4. Click `Add`
+5. Open `Custom Repositories` again and you should see `PJLink2` at the top of the list, click it
+6. Click `Download` in lower right corner
+7. Select the latest version and click `Download`
+8. Configure your settings as described below
+9. Restart Home Assistant
+
 **Manually**
 
-Copy `pjlink2` folder from [latest release](https://github.com/TheRealKillaruna/pjlink2/releases/latest) to `custom_components` folder in your config folder.
+1. Copy `pjlink2` folder from [latest release](https://github.com/TheRealKillaruna/pjlink2/releases/latest) to `custom_components` folder in your config folder.
+2. Configure your settings as described below
+3. Restart Home Assistant
 
 
 ## Configuration