The latest hivemind branch that supports communities is 214-core (https://github.com/steemit/hivemind/tree/214-core) but it hasn't been yet merged into the master branch and their dockerhub image hasn't been updated (the current one is 4 months old). That's probably why nobody was aware of that branch!
Hivemind-communities requires a resynch and reindex, given the added columns in a few postgres tables.
Support for communities using 214-core, I built a docker image and integrated that in the ./run.sh build command. You can always build your own image, just tag it hivemind:latest and you're good to go.
Additional test commands: ./run.sh testhivecom - test a hive-communities API call to hivemind ./run.sh testjussicom - test a hive-communities API call to jussi
Update procedure
Requirements: 240GB for the database and 50GB for the dump file.
We have not curated any of drakos's posts yet. But you can encourage our curation team to review posts by visiting them regularly and by referring other readers. Because we give priority to frequently read content.