Installs spruce.
It uses alpine linux image as base and deploys statically compiled spruce release which runs directly.
Spruce processes manifest files. To make them available to spruce inside the container, they must be mounted via one or several volumes.
$ cd spruce
$ docker build -t spruce .
or
$ rake build:spruce
$ docker run -v /path/to/local/manifests:/manifests spruce spruce merge /manifests/base-manifest.yml /manifests/stub.yml
$ docker run -v /path/to/local/manifests:/manifests governmentpaas/spruce spruce merge /manifests/base-manifest.yml /manifests/stub.yml