Previously, we only published docker images for non-prerelease
builds. However, on our move to 1.0.0, we will be publishing a few
`-beta` (and perhaps one or more `-rc`) builds. These are high quality
builds we want folks to use. So, we will publish them to DockerHub and
update the `latest` tag, similar to what we do for NPM and PyPI.
I will manually publish 1.0.0-beta.2, but landing these changes means
that future releases will be published automatically
Fixes#3092