feat(whitby): Enable Prometheus instance on whitby r/2493

Enables Prometheus with a local node exporter, and nothing else for
now.

Some additional collectors have been enabled for things that might be
relevant on whitby:

* systemd: all our services run in systemd
* processes: might be interesting for build-related stats
* logind: might be interesting for interactive usage stats

Change-Id: I48dacdd9c68b4be9edff7b3cb6256dad562498c4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2930
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Reviewed-by: lukegb <lukegb@tvl.fyi>

0 files changed, 0 insertions, 0 deletions