Support rabbitmq/celery with docker

[mstriemer]

No description provided.

[kmaglione]

+1 I've thought about doing this several times. This is really nicely done.

[kmaglione]

Might be cleaner to use extends here. Or define this as the base, and have web extend it, since that adds exposed ports.

[mstriemer]

I'll try that I had no idea that was a thing. Thanks.

[mstriemer]

extends doesn't work with services that have links. So using extends means that we build some generic olympia service that does nothing before building the other two and does not seem to give any benefit. The three builds (olympia, worker and web) all take about the same length of time.

[kmaglione]

We should probably change CELERY_ALWAYS_EAGER to False for this config. The question is, do we want to change that in settings.py, or do we want a separate set of default settings for Docker users, to be kind to new devs starting without it?

In any case, this is awesome. r+wc

[mstriemer]

I'm not going to mess with the settings for now but we could definitely make this on by default in the future. I'm just modifying my local settings to test using celery.