Consider adding a /metrics endpoint

[dBitech]

to enable profiling

[brendan-ward]

Thanks for the suggestion @dBitech

I think capturing and persisting metrics internally is outside of the intended scope of the project / contributor capacity for the time being, so I'm going to close this issue. I agree it may be useful, but it is nontrivial.

You can probably use other tools in the Go ecosystem to profile the internals of mbtileserver, and there are other tools that can be used to capture server-side metrics under load such as response time, memory usage, CPU usage, etc. - which are likely the more valuable metrics anyway.