Create hosted development and staging environments running Druid with real or mock data, and be able to easily spin them up (for example, during CI). However, at a minimum, some tooling (Docker Compose?) that can be used to locally spin up an environment, and load it with sample data, may be necessary to facilitate the AQS 2.0 project.

See also:
https://gerrit.wikimedia.org/r/679295 (a work-in-progress Docker Compose environment for AQS)
https://gitlab.wikimedia.org/eevans/aqs (an alternative work-in-progress Docker Compose environment for AQS)