Important: Use docker 17.09 until a fix comes out:
As of 13 Feb 2018, the latest stable docker version (17.12) hangs regularly when using docker-compose and bind-mounted filesystems. The docker issue is moby/moby#35933. As a result, we're using 17.09 exclusively until this can be solved upstream. Note that the "edge" version 18.02 may have the new fix in it.
Backdrop support!
v0.13.0 adds initial support for the Backdrop CMS, a Drupal fork. Drush in the web container is not yet supported but is a high priority. See the Backdrop quickstart.