promtail_2.9.2_amd64.deb should add user promtail to group adm

[vcarceler]

Describe the bug
Installing promtail_2.9.2_amd64.deb user promtail should be added to the group adm.

To Reproduce
Download and install promtail_2.9.2_amd64.deb in Ubuntu 22.04.

Expected behavior
The user promtail should be added to the group adm so promtail has access to logs and journal.

Environment:

• Ubuntu 22.04

Screenshots, Promtail config, or terminal output
If you configure promtail to send journal to Loki without adding promtailto group adm you don't get any indication in the journal.

Nov 23 15:23:37 promtail1 systemd[1]: Started Promtail service.
Nov 23 15:23:37 promtail1 promtail[150]: level=info ts=2023-11-23T14:23:37.468666411Z caller=promtail.go:133 msg="Reloading configuration file" md5sum=48c1e8324f104eb0>
Nov 23 15:23:37 promtail1 promtail[150]: level=info ts=2023-11-23T14:23:37.477569761Z caller=server.go:322 http=[::]:9080 grpc=[::]:41997 msg="server listening on addr>
Nov 23 15:23:37 promtail1 promtail[150]: level=info ts=2023-11-23T14:23:37.477882828Z caller=main.go:174 msg="Starting Promtail" version="(version=2.9.2, branch=HEAD, >
Nov 23 15:23:37 promtail1 promtail[150]: level=warn ts=2023-11-23T14:23:37.477999442Z caller=promtail.go:263 msg="enable watchConfig"

[axi92]

Is adm the right group? In my case on Ubuntu 24.04 the group systemd-journal was enough.
sudo usermod -a -G systemd-journal promtail

But yeah this info is missing in the docs.