chore(release): 2.2.0 [skip ci]

# [2.2.0](https://gitlab.com/to-be-continuous/docker/compare/2.1.2...2.2.0) (2021-11-24)

### Features

* add configurable metadata variable with OCI recommended labels ([d3630f93](https://gitlab.com/to-be-continuous/docker/commit/d3630f9356ba3c9934f972ca728f562e3d015019))

CHANGELOG.md

+# [2.2.0](https://gitlab.com/to-be-continuous/docker/compare/2.1.2...2.2.0) (2021-11-24)
+
+
+### Features
+
+* add configurable metadata variable with OCI recommended labels ([d3630f9](https://gitlab.com/to-be-continuous/docker/commit/d3630f9356ba3c9934f972ca728f562e3d015019))
+
 ## [2.1.2](https://gitlab.com/to-be-continuous/docker/compare/2.1.1...2.1.2) (2021-10-19)
 
 

README.md

@@ -9,7 +9,7 @@ In order to include this template in your project, add the following to your `.g
 ```yaml
 include:
   - project: 'to-be-continuous/docker'
-    ref: '2.1.2'
+    ref: '2.2.0'
     file: '/templates/gitlab-ci-docker.yml'
 ```
 
@@ -330,7 +330,7 @@ Here is a `.gitlab-ci.yaml` using an external Docker registry:
 ```yaml
 include:
   - project: 'to-be-continuous/docker'
-    ref: '2.1.2'
+    ref: '2.2.0'
     file: '/templates/gitlab-ci-docker.yml'
 
 variables:
@@ -348,7 +348,7 @@ Here is a `.gitlab-ci.yaml` that builds 2 Docker images from the same project (u
 ```yaml
 include:
   - project: 'to-be-continuous/docker'
-    ref: '2.1.2'
+    ref: '2.2.0'
     file: '/templates/gitlab-ci-docker.yml'
 
 variables:

templates/gitlab-ci-docker.yml

@@ -376,7 +376,7 @@ stages:
     fi
   }
 
-  if [[ "$TEMPLATE_CHECK_UPDATE_DISABLED" != "true" ]]; then check_for_update docker "2.1.2"; fi
+  if [[ "$TEMPLATE_CHECK_UPDATE_DISABLED" != "true" ]]; then check_for_update docker "2.2.0"; fi
   init_workspace
 
   # ENDSCRIPT
@@ -384,7 +384,7 @@ stages:
 .docker-base:
   services:
     - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
-      command: ["--service", "docker", "2.1.2"]
+      command: ["--service", "docker", "2.2.0"]
   before_script:
     - *docker-scripts
 
@@ -413,7 +413,7 @@ stages:
     _TRACE: "${TRACE}"
   services:
     - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
-      command: ["--service", "docker", "2.1.2"]
+      command: ["--service", "docker", "2.2.0"]
     - name: $DOCKER_DIND_IMAGE
       alias: docker
       command: