Add prometheus metrics

[icco]

Describe the feature you'd like

I'd like for prometheus metrics to be exported on /metrics with guages of the metrics that are on /dashboard/admin.

Describe the benefits this would bring to existing Hoarder users

This would make it easy to monitor hoarder's crawling and scraping

Can the goal of this request already be achieved via other means?

Yes, you can check the admin dashboard.

Have you searched for an existing open/closed issue?

• I have searched for existing issues and none cover my fundamental request

Additional context

No response

[MohamedBassem]

I like the idea!