Migrate the docker-compose example to the Prometheus

[olegbespalov]

What?

Our docker-compose example is based on InfluxDB v1.

It will be good if we revisit it and migrate to the Prometheus. As the dashboard, we could use the latest updates from https://github.com/grafana/xk6-output-prometheus-remote/blob/main/docker-compose.yml, recently made by @ppcano

Maybe we could wait a bit till the https://github.com/grafana/k6/issues/2557, which could also be an excellent example of the metics exports standard.

Why?

The updated version could be a better example for the users.