Looking at the Redash forums the devs have indicated a number of times that the latest beta - 9.0.0-beta.b42121 is also the production version.
There doesn't seem much inclination at their end to create a new prod tag using the same beta baseline.
Is it possible to allow the use of this version in Cloudron?
It's apparently what they're using in the redash hosted offering. So it would seem to be production ready.
There are a number of features in 9.0 that would be very useful to me on my cloudron instances.