The document service originally became part of this repository because
it was used in a Mapzen demo/workshop some time ago as a more convenient
way to index documents for custom importers.
While it could be useful, it isn't currently supported and is not used
in this repository. By removing it from all the docker-compose.yml
files, we can reduce the size of downloaded Docker images.
We have some settings hanging around our docker-compose.yml files that
are hanging around from when we did things quite differently.
Previously, we built the libpostal_baseimage image directly as part of
our Docker setup projects. This required setting it as a "dependency" of
other images. That's no longer required, and having that `dependency`
setting is causing an extra container to be launched, after which it
does nothing and shuts down.
Additionaly, we used to store libpostal training data in a separate
filesystem. It's now baked into the `libpostal_baseimage` image, so all
those settings are no longer required.