Jellyfin can expose metrics in Prometheus format, but this functionality
is disabled by default. To enable it, we must set `EnableMetrics` in
the configuration file. This commit adds a template configuration file
that uses the `jellyfin_enable_metrics` Ansible variable to control this
value.
In order to enable authentication using LDAP over TLS in Jellyfin, we
need to expose the CA certificate that issues the LDAP server
certificates to the container.
Jellyfin is a multimedia library manager. Clients can browse and stream
music, movies, and TV shows from the server and play them locally
(including in the browser).
