In a later restructure of Ansible, the GlithTip role should become part
of the admin role, just like the Grafana roles has to be merged in.

Use the reusable Docker definitions to install Docker.
In the compose stack, use the host CA bundle for a.o. uptime monitor as
often custom certs are used on contest floors which must be trusted in
the container.

The runc script interferes with running Docker containers.

Use the GlitchTip API to provision some default configuration based on
the defined hosts in Ansible.

The dj_notify python scripts acts as a Slack webhook receiver, which
forwards the notifications to the desktop notifications and plays an
alert sound to notify everyone nearby.