Galaxy Docker Upgrade

Hello,
We are planning to upgrade our Production Docker Galaxy (Rel 16).
In our test environment, we are using the GitHub - bgruening/docker-galaxy-stable: Docker Images tracking the stable Galaxy releases. instructions.
It seems (Perhaps I am wrong) that that pulls Galaxy Rel 20.
On the other hand, I see that Rel 22 is available.
Can we get recommendations to what Galaxy release (Under docker) we should upgrade ?
We are a very large Galaxy installation (More than 8,000 users) so we would like to use the most stable Production version of Galaxy, while getting the benefits of upgradng from our very old (16) release.
Thanks!
George Weingart PhD
Huttenhower Lab
Harvard School of Public Health

Hello,
I posted this question 13 days ago and have received no replies.
Can someone from the Galaxy Support team please address the issue or can someone let me know where should I post the question or how to contact someone in the Galaxy Support Team to discuss ?
Thanks !
George Weingart PhD
Huttenhower Lab
Harvard School of Public Health