How would a hobbyist programmer get started with tracing for a simple web app? Where do the traces end up and how do I query it? Can tracing be used in a development environment?

Context: the last thing I wrote used Deno and Deno Deploy.

opentelemetry has a service you can run that will collect the telemetry data and you can export it to something like prometheus which can store it and let you query it. Example here https://github.com/open-telemetry/opentelemetry-collector-co...

Typically in dev environments trace spans are just emitted to stdout just like logs. I sometimes turn that off too though because it gets noisy.