Update index.md (#3267)

docs/docs/configuration/index.md

@@ -25,6 +25,10 @@ cameras:
       height: 720
 ```
 
+### VSCode Configuration Schema
+
+VSCode (and VSCode addon) supports the JSON schemas which will automatically validate the config. This can be added by adding `# yaml-language-server: $schema=http://frigate_host:5000/api/config/schema` to the top of the config file. `frigate_host` being the IP address of frigate or `ccab4aaf-frigate` if running in the addon.
+
 ### Full configuration reference:
 
 :::caution