Builds and tags for 3.9 betas

[michaelklishin]

Hey folks 👋.

Team RabbitMQ is going to ship 3.9.0-beta.1 quite soon. It would be great to have a community image tag with this version.
Right now separate builds and tags are produced for RCs but not betas. Do you think we can extend this to betas?
Would this be too problematic in terms of maintenance?

Not every RabbitMQ release has betas, sometimes we go straight to RCs. But in this case it would be a huge service to the community if betas were available in this Docker image 🤓💪😍

[yosifkit]

No maintenance problem adding it. The version scraping code already looks for beta's 👍 which is how we already have the 3.8.18-beta.1 image (docker-library/official-images#10358). So I think we just need a tag to exist with the generic-unix tar file and we can update #467.

rabbitmq/versions.sh

Line 35 in 8942a4b

rcGrepExpr='beta|milestone|rc'

[michaelklishin]

Ah, perfect. Nothing specific to betas to do then 👍