== Boxes ==
The base box that is used at this time is [https://vagrantcloud.com/debian/boxes/contrib-stretch64/versions/9.4.0/providers/virtualbox.box Debian stretch](see also https://app.vagrantup.com/debian). If you <code>vagrant up --provision</code> an old box based on Ubuntu, then it will prompt you to destroy the existing box (so that it can re-provision with the right OS) <code>vagrant destroy -f; vagrant up</code>
Each '[http://docs.vagrantup.com/v2/providers/basic_usage.html box]' in vagrant is specific to a provider, so we'll need to get a new box that will run on AWS.