Use packer build ... to create vagrant box to run Alpine Linux 3.6.x.
Installing from an ISO can be a little tricky, and sensitive to load on the host, so we separate that into its own build:
ᐅ cd 00-iso-install
ᐅ packer build alpine-iso-install.json
That will use the official ISO from upstream, to install Alpine Linux in
VirtualBox, exporting the result to a box that can be imported into Vagrant.
The install is bare-minimum, and simply provides for a way for root to
login over SSH.
We can then take the OVF that results from the initial build, and we can run some additional provisioning to create our concept of a "base host" with Alpine Linux:
ᐅ cd ../01-alpine-base
ᐅ packer build alpine-base.json
This build will configure apk, add a user for vagrant, disable root logins
over SSH, cleanup SSH keys and apk cache, etc.
Thanks to maier, and higebu for prior art to base this work on.