v7.0.0-beta.1

This is a pre-release which includes several significant changes, including one breaking change — the -endpoint http://localhost:8080/metrics flag is removed and replaced by -listen localhost:8080, which means the /metrics endpoint is no longer configurable. The exporter now has a human-friendly-ish index page at the default / route. Finally, "official" Docker images are now available as ghcr.io/peterbourgon/fastly-exporter and visible on the GitHub packages page.

Changelog highlights:

• Support for new Compute@Edge metrics — #72
• Refactor for Prometheus HTTP service discovery — #73
• Update README with example http_sd_config — #76
• Publish Docker images — #75
• Add last_successful_response metric — #78
• Add datacenter_info metric — #80, #81

Full Changelog: v6.1.0...v7.0.0-beta.1