Traefik, StripPrefix/ReplacePathRegex and Redirects

Hi @twexler

I think some Prometheus configuration is required to get the returned paths correct:

When running Prometheus behind the nginx proxy, you'll need to set the external URL to https://example.com/prometheus and the route prefix to / :

prometheus \
  --config.file=/path/to/prometheus.yml \
  --web.external-url=https://example.com/prometheus \
  --web.route-prefix="/"