ci: Run docker provider too

.github/workflows/spectesting.yml

@@ -29,7 +29,7 @@ jobs:
       matrix:
         host_os: ['hashicorp/bionic64']
         guest_os: ['hashicorp-vagrant/ubuntu-16.04']
-        providers: ['virtualbox']
+        providers: ['virtualbox', 'docker']
     steps:
       - name: Code Checkout
         uses: actions/checkout@v1
@@ -54,7 +54,7 @@ jobs:
         host_os: ['hashicorp/bionic64']
         guest_os: ['hashicorp-vagrant/ubuntu-16.04']
         docker_images: ['nginx']
-        providers: ['virtualbox']
+        providers: ['virtualbox', 'docker']
     steps:
       - name: Run Tests with host ${{ matrix.host_os }} using provider ${{ matrix.providers }}
         run: ./.ci/spec/run-test.sh

test/vagrant-spec/Vagrantfile.spec

@@ -119,7 +119,10 @@ Vagrant.configure(2) do |global_config|
                 keep_color: true,
                 env: {
                   "VAGRANT_SPEC_ARGS" => "test --components provider/docker/docker/* #{spec_cmd_args}".strip,
-                  "VAGRANT_SPEC_DOCKER_IMAGE" => docker_image
+                  "VAGRANT_SPEC_DOCKER_IMAGE" => docker_image,
+                  "VAGRANT_LOG" => "trace",
+                  "VAGRANT_LOG_LEVEL" => "trace",
+                  "VAGRANT_SPEC_LOG_PATH" => "/tmp/vagrant-spec.log",
                 }
               )
             end