Remove the unused Glance dashboard

Drop the Glance stack, its home. route and DNS record, the glance.*
labels on every container, and the Glance restart in the Warhammer
feed cron script. Update docs to match.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

roles/docker/README.md

@@ -54,7 +54,6 @@ Deploys and manages a comprehensive self-hosted infrastructure with 24 container
 - **Postiz** - Social media management
 
 ### Monitoring (`monitoring/`)
-- **Glance** - Customizable dashboard with monitoring
 - **Change Detection** - Website monitoring
 - **Apprise API** - Unified notifications
 - **Gotify** - Self-hosted push notification service
@@ -190,12 +189,6 @@ Services expect to be accessible via subdomains of configured domains:
 
 ## Monitoring & Management
 
-### Glance Dashboard Integration
-All services include Glance labels for dashboard monitoring:
-- Service health status
-- Container resource usage
-- Parent-child relationships for multi-container services
-
 ### Operational Features
 - Automatic container restart policies
 - Health checks for database services