They seem to have move ahead by leaps and bound, after all it's been almost 2 years since the OP.
New release a few days ago and we can see there's 3-4 updates per month for a while.
https://appflowy.io/whatsnew
They've even added an AI module in March 23.
"⭐️ v0.1.1 brings the power of OpenAI into your AppFlowy pages. Ask AI to write anything for you in AppFlowy. Learn more about AppFlowy + OpenAI.⭐️"
What else, Dockerized? Yes, it is!
Their roadmap seems to be on fire.
https://github.com/orgs/AppFlowy-IO/projects/5/views/12
UPDATE
I've just added an update to the previous Notion thread here.