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/templates/dockge-compose.yml.j2

@@ -2,11 +2,6 @@ services:
   dockge:
     image: louislam/dockge:1
     restart: unless-stopped
-    labels:
-      glance.name: Dockge
-      glance.icon: si:docker
-      glance.url: http://{{ network.tailscale_hostname }}:5001
-      glance.description: Docker management      
     ports:
       # Host Port : Container Port
       - 5001:5001