Add task queuing support to compose.yaml

[jsstevenson]

Currently the Docker compose file spins up an AnyVar instance sans any of the queuing stuff. It might be nice to enable that, though -- it's more or less essential for nontrivial VCF processing and could be helpful for other types of bulk jobs in the future.

I think this would at minimum entail

• adding the queuing dependencies to the AnyVar docker image
• adding a redis service to the compose file
• adding a separate Celery worker service to the compose file
• add env vars to make all of the above connect to each other

A few questions

• Should this be in the main compose.yaml file or a separate one?
• Should it have concurrent workers turned enabled? Configs for that?

[jsstevenson]

Initial feeling on 11/7 call is that these should become part of the main compose file

[jennifer-bowser]

I would agree, it'd be nice to have this be enabled out of the box! I personally think AnyVar is a little too customizable at the moment, and it makes setup a confusing.

I would vote to have this in the main compose.yaml file, but I'm not opposed to having it be its own compose file if others would prefer that.