Upgrade docker-compose version

[kerchner]

[lwrubel]

We're currently using version 2, which is not deprecated. Version 3 provides options for using Docker swarm, which we are not using. Unless there are specific features of later Docker versions that we need (see release notes) I think we can leave this as is for now. Our running version of Docker Engine is fine with either version.

If we were to want to specify version 3, we would need to adjust to the new specification for volumes_from and review network settings.

NIST had asked about using version later than 2