Docker Compose <= 1.14 doesn't create volume directories

[bittner]

Just a technical note on Docker Compose:

When you use a version <= 1.14 on a freshly cloned repository docker-compose up fails, because it can only mount Docker volumes into existing directories. Newer versions of Docker Compose do create the non-existing directories automatically.

This is easily fixed locally, though: (if you don't want to or can't upgrade to a newer version of Compose)

$ mkdir pgdata assets webpack