Please update documentation once the Release Number is know...
https://docs.inedo.com/docs/proget-docker-semantic-versioning#virtual-release-number-tags
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The `latest` tag refers to the highest *stable* version number in your repository, regardless of whether it was the most recent container image tagged. For example, if you tag an image with `2.8.4`, but the highest tag in your repository is `3.1.0`, then the `latest` tag will still refer to `3.1.0`. However, if you tag an image with `3.1.11-beta`, the `latest` will still refer to `3.1.0`, because `3.1.1-beta` is a prerelease version.
The `latest-unstable` tag (available from ProGet 5.3.x) refers to the highest version, including prerelease versions. Following the previous example, `latest-unstable` would refer to `3.1.11-beta`, and `latest` would refer to `3.1.10`. If you don't use prerelease versioning (or a stable version is the highest version), then `latest-unstable` and `latest` will always refer to the same image.