RabbitMQ in docker compose file is very out of date

[Montg0mery]

From docker-compose.yaml:

  rabbitmq:
    image: "rabbitmq:3.7.7"

You can see from here (https://www.rabbitmq.com/versions.html) that RabbitMQ 3.7 went end of life in 2020.

Unless there is a specific reason to be pinned to an end-of-life version (and a specific patch-level at that), please update this to the latest stable version (and don't pin to a specific patch-level if there's no reason to).

Thank you.

[timabbott]

Yeah, there's no good reason for that to be pinned to an old version. @mikkeschiren would you have time to test the latest version (my main fear would be the RabbitMQ container failing to upgrade properly) and put up a PR? I would also not mind this changing to a latest tag; we don't depend on anything specific about the version.