Embed env_vars guidance in docs

joplin/CHANGELOG.md

@@ -1,3 +1,4 @@
+- Added support for configuring extra environment variables via the `env_vars` add-on option alongside config.yaml. See https://github.com/alexbelgium/hassio-addons/wiki/Add-Environment-variables-to-your-Addon-2 for details.
 
 ## 3.4.4 (27-09-2025)
 - Update to latest version from etechonomy/joplin-server (changelog : https://github.com/etechonomy/joplin-server/releases)

joplin/README.md

@@ -100,7 +100,7 @@ To enable email functionality for user registration and notifications:
 This addon supports custom scripts and environment variables through the `addon_config` mapping:
 
 - **Custom scripts**: See [Running Custom Scripts in Addons](https://github.com/alexbelgium/hassio-addons/wiki/Running-custom-scripts-in-Addons)
-- **Environment variables**: See [Add Environment Variables to your Addon](https://github.com/alexbelgium/hassio-addons/wiki/Add-Environment-variables-to-your-Addon)
+- **env_vars option**: 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.
 
 ## Installation
 
@@ -127,3 +127,5 @@ comparison to installing any other Hass.io add-on.
 Create an issue on [GitHub](https://github.com/alexbelgium/hassio-addons/issues).
 
 [repository]: https://github.com/alexbelgium/hassio-addons
+
+

joplin/config.yaml

@@ -84,7 +84,7 @@ privileged:
   - SYS_TIME
 schema:
   env_vars:
-    - name: match(^[A-Z0-9_]+$)
+    - name: match(^[A-Za-z0-9_]+$)
       value: str?
   APP_BASE_URL: str
   DB_CLIENT: str?