stats events for use with prometheus

I am struggling a bit with getting some basic metrics into prometheus. Is there some sample metrics file that has most common metrics configured?

[@ conf.d]# cat 05-metrics.conf

# https://doc.dovecot.org/admin_manual/event_design/#event-design

metric imap_command { filter = event=imap_command_finished group_by = cmd_name tagged_reply_state }