For instructions go to the tagged image versions list.
New blender versions are checked daily from the github mirror.
In case of a failure, you can create a pre/vX.X.X branch and debug the action.
When ready, create a vX.X.X tag or manually trigger the Auto-update workflow.
The Dockerfile was inspired by https://github.com/nytimes/rd-blender-docker
Blender download: https://www.blender.org/download/
Blender releases: https://download.blender.org/release/