* bump middleman-hashicorp to 0.3.40 and exclude guide rendering
* add notes to Makefile for volume mounts hack PR#5847
* make note of the PR number in the comment
This has been working really well on Nomad and hashicorp.com, so I am
ready to port it out to Consul as a beta. This moves the local
development to a Docker container, which is the same container that we
use to publish the website in production. The result is much faster and
more consistent deploys.