docs: add links to reference pages

Author: kenjis

docs/getting_started/configuration.md

@@ -8,9 +8,9 @@ If you have completed the setup according to this documentation, you will have
 the following configuration files:
 
 - **app/Config/Auth.php**
-- **app/Config/AuthGroups.php** - For Authorization
-- **app/Config/AuthToken.php** - For AccessTokens and HmacSha256 Authentication
-- **app/Config/AuthJWT.php** - For JWT Authentication
+- **app/Config/AuthGroups.php** - For [Authorization](../references/authorization.md)
+- **app/Config/AuthToken.php** - For [AccessTokens](../references/authentication/tokens.md#configuration) and [HmacSha256](../references/authentication/hmac.md#configuration) Authentication
+- **app/Config/AuthJWT.php** - For [JWT Authentication](../addons/jwt.md#configuration)
 
 Note that you do not need to have configuration files for features you do not use.