Embed env_vars guidance in docs

scrutiny_fa/README.md

@@ -36,6 +36,8 @@ Features :
 
 ## Configuration
 
+Use the add-on `env_vars` option to pass extra environment variables (uppercase or lowercase names). See https://github.com/alexbelgium/hassio-addons/wiki/Add-Environment-variables-to-your-Addon-2 for details.
+
 ---
 
 Webui can be found at <http://homeassistant:8080>, or through Ingress.
@@ -128,3 +130,5 @@ Create an issue on github, or ask on the [home assistant thread](https://communi
 https://github.com/alexbelgium/hassio-addons
 
 [repository]: https://github.com/alexbelgium/hassio-addons
+
+

scrutiny_fa/config.yaml

@@ -32,7 +32,7 @@ privileged:
   - DAC_READ_SEARCH
 schema:
   env_vars:
-    - name: match(^[A-Z0-9_]+$)
+    - name: match(^[A-Za-z0-9_]+$)
       value: str?
   COLLECTOR_API_ENDPOINT: str?
   COLLECTOR_HOST_ID: str?