Hi all,
i cannot add/help concerning the correct order of the version-upgrade-dance but…
i’d like to (advertise? 
) something concerning the volume remark jeremy mentioned.
I found relief in upgrading when i settled upon cloning the currently used volumes into “target-version-volumes” to be used in the new “target-version” compose-setup. This way i always can go back to the “untouched source-version-volumes” when something goes wronk 
You can find helpful scripts for that here: docker-convenience-scripts/docker_clone_volume.sh at master · gdiepen/docker-convenience-scripts · GitHub
I explained my process here: Documentation - How to include 3rd Party Plugins in a Docker-Setup - #12 by daniel
cheers
Daniel