This project is deprecated and not maintained anymore, the Query Workbanch is now integrated into the web admin, since version 4.5.0.
You can override the following environment parameters:
GUI_PORT=:8094
COUCHBASE_URL=http://127.0.0.1:8091
USER=
PASS=
To give it a try run:
docker run --rm --net=host wearemakery/couchbase-query-workbench:dp2