WatchTower Metrics: Add

Is your feature request related to a problem? Please describe.

Congratulations on the sucess of you fork.

Just migrated today from contanrrr and thought I would LIKEWISE migrate my previous feature request for metrics enhancement.

Rather then restating I linked to the orginal in Containarrr's archived repo.

Thanks for picking service up, and moving things forward.

Describe the solution you'd like

per above

Describe alternatives you've considered

per above

Additional context

No response