Update config documentation

**Description**
Currently config lacks proper notifications support.

**Proposed solution**
Add configurable notifications with sensible defaults.

**Priority**: Low/Medium

Start by locating the repository's configuration entry point and any existing notification-related code, then read the issue discussion for expected behavior. Define the configurable notification options and sensible defaults, and verify the resulting configuration and notification behavior with the project's available checks.

Written by the indexing model from the issue text.