Add initial version of Vagrant-Docker files

Add Vagrantfiles and supporting documentation for running Docker
under Vagrant.

vagrant-docker/README.md

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+# Running Docker in Vagrant
+
+These files were created to allow users to use Vagrant ([http://www.vagrantup.com](http://www.vagrantup.com)) to quickly and relatively easily launch one or more Docker ([http://www.docker.com](http://www.docker.com)) containers. The configuration was tested using Vagrant 1.7.2, VMware Fusion 6.0.5, and the Vagrant VMware plugin.
+
+## Contents
+
+* **README.md**: The file you're currently reading.
+
+* **host/Vagrantfile**: This file is used by Vagrant to spin up a "host VM" for use with the Vagrant Docker provider. Edit this file to change the Vagrant box you'd like to use; by default, this Vagrantfile uses the "slowe/ubuntu-trusty-x64" box (built for the "vmware_desktop" provider).
+
+* **Vagrantfile**: This file is used by Vagrant to spin up the Docker containers on the host VM created by `host/Vagrantfile`. Edit this file to change any of the properties of the Docker container you want created by Vagrant.
+
+## Instructions
+

vagrant-docker/Vagrantfile

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+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# Specify Vagrant version and Vagrant API version
+Vagrant.require_version ">= 1.6.0"
+VAGRANTFILE_API_VERSION = "2"
+ENV['VAGRANT_DEFAULT_PROVIDER'] = 'docker'
+
+# Create and configure the Docker container(s)
+Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
+
+  # Disable synced folders for the Docker container
+  # (prevents an NFS error on "vagrant up")
+  config.vm.synced_folder ".", "/vagrant", disabled: true
+
+  # Configure the Docker provider for Vagrant
+  config.vm.provider "docker" do |docker|
+
+    # Define the location of the Vagrantfile for the host VM
+    # Comment out this line to use default host VM that is
+    # based on boot2docker
+    docker.vagrant_vagrantfile = "host/Vagrantfile"
+
+    # Specify the Docker image to use
+    docker.image = "nginx"
+
+    # Specify port mappings
+    # If omitted, no ports are mapped!
+    docker.ports = ['80:80', '443:443']
+
+    # Specify a friendly name for the Docker container
+    docker.name = 'nginx-container'
+  end
+end

vagrant-docker/host/Vagrantfile

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+# -*- mode: ruby -*-
+# vi: set ft=ruby :
+
+# Specify Vagrant version and Vagrant API version
+Vagrant.require_version ">= 1.6.0"
+VAGRANTFILE_API_VERSION = "2"
+
+# Create and configure the VM(s)
+Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
+
+  # Assign a friendly name to this host VM
+  config.vm.hostname = "docker-host"
+
+  # Skip checking for an updated Vagrant box
+  config.vm.box_check_update = false
+
+  # Always use Vagrant's default insecure key
+  config.ssh.insert_key = false
+
+  # Spin up a "host box" for use with the Docker provider
+  # and then provision it with Docker
+  config.vm.box = "slowe/ubuntu-trusty-x64"
+  config.vm.provision "docker"
+
+  # Disable synced folders (prevents an NFS error on "vagrant up")
+  config.vm.synced_folder ".", "/vagrant", disabled: true
+end