Documentation: missing examples with named docker volumes / no info about the right data-path (/prometheus) in container

Hi there,

i took me some time to create a prometheus-docker-container with a named volume, because its not clearly documented.

On https://prometheus.io/docs/prometheus/latest/installation/ there is written:
[...] "For production deployments it is highly recommended to use a named volume (https://docs.docker.com/storage/volumes/) to ease managing the data on Prometheus upgrades."

But unfortunaltey there is no example about named volumes. What made me sad is that there is no hint which data-path in the container (/prometheus) should be mounted to the named volume.

If you look at the grafana-documentation its pretty good documented and there is an example with named volumes:

https://grafana.com/docs/grafana/latest/setup-grafana/configure-docker/

Run Grafana container with persistent storage (recommended)

docker volume create grafana-storage
docker run -d -p 3000:3000 --name=grafana -v grafana-storage:/var/lib/grafana grafana/grafana-enterprise

Best Regards
Zen

Start with the Prometheus installation documentation page linked in the issue and review its production deployment guidance. Add a named-volume example that shows mounting the container's /prometheus path; done when users can follow the example and understand where Prometheus data is stored.