Every site gains an About this version page, linked from the footer, showing exactly what is running: build number with a link to its log, commit and message, branch, when it was built and started, image, environment, Fly app and region, and Node.js version. Under What changed it lists the release notes for that build, or the latest notes when the build has none, with links to all release notes. The "new version ready" notice links to it, and a local development build says so rather than pretending to be a deployment.