Somun should have a http endpoint for admin and reporting access

[deniza]

We can embed a small, performant web server and use it for things like admin access, or reporting.

Some alternatives:

• Jetty https://jetty.org/
• Undertow https://undertow.io/

[deniza]

There is already a subsystem designed for this purpose: AdminDashboardServer. We should figure out to make it customizable. Current structure is somehow hardcoded. Both server side classes and client html implementation should be customizable.