chore(release): 2.4.0 [skip ci]

# [2.4.0](https://gitlab.com/to-be-continuous/docker/compare/2.3.3...2.4.0) (2022-04-27)

### Features

* add image digest support ([57998b26](https://gitlab.com/to-be-continuous/docker/commit/57998b26c37086faee0b5524d31917f4f4a3ce53))

CHANGELOG.md

+# [2.4.0](https://gitlab.com/to-be-continuous/docker/compare/2.3.3...2.4.0) (2022-04-27)
+
+
+### Features
+
+* add image digest support ([57998b2](https://gitlab.com/to-be-continuous/docker/commit/57998b26c37086faee0b5524d31917f4f4a3ce53))
+
 ## [2.3.3](https://gitlab.com/to-be-continuous/docker/compare/2.3.2...2.3.3) (2022-04-12)
 
 

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: '2.3.3'
+    ref: '2.4.0'
     file: '/templates/gitlab-ci-docker.yml'
 ```
 
@@ -342,7 +342,7 @@ Here is a `.gitlab-ci.yaml` using an external Docker registry:
 ```yaml
 include:
   - project: 'to-be-continuous/docker'
-    ref: '2.3.3'
+    ref: '2.4.0'
     file: '/templates/gitlab-ci-docker.yml'
 
 variables:
@@ -360,7 +360,7 @@ Here is a `.gitlab-ci.yaml` that builds 2 Docker images from the same project (u
 ```yaml
 include:
   - project: 'to-be-continuous/docker'
-    ref: '2.3.3'
+    ref: '2.4.0'
     file: '/templates/gitlab-ci-docker.yml'
 
 variables:
@@ -416,11 +416,11 @@ With:
 include:
   # main template
   - project: 'to-be-continuous/docker'
-    ref: '2.3.3'
+    ref: '2.4.0'
     file: '/templates/gitlab-ci-docker.yml'
   # Vault variant
   - project: 'to-be-continuous/docker'
-    ref: '2.3.3'
+    ref: '2.4.0'
     file: '/templates/gitlab-ci-docker-vault.yml'
 
 variables:

templates/gitlab-ci-docker-vault.yml

@@ -9,6 +9,6 @@ variables:
 .docker-base:
   services:
     - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
-      command: ["--service", "docker", "2.3.3"]
+      command: ["--service", "docker", "2.4.0"]
     - name: "$CI_REGISTRY/to-be-continuous/tools/vault-secrets-provider:master"
       alias: "vault-secrets-provider"

templates/gitlab-ci-docker.yml

@@ -375,7 +375,7 @@ stages:
     fi
   }
 
-  if [[ "$TEMPLATE_CHECK_UPDATE_DISABLED" != "true" ]]; then check_for_update docker "2.3.3"; fi
+  if [[ "$TEMPLATE_CHECK_UPDATE_DISABLED" != "true" ]]; then check_for_update docker "2.4.0"; fi
   init_workspace
 
   # ENDSCRIPT
@@ -383,7 +383,7 @@ stages:
 .docker-base:
   services:
     - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
-      command: ["--service", "docker", "2.3.3"]
+      command: ["--service", "docker", "2.4.0"]
   before_script:
     - *docker-scripts
 
@@ -412,7 +412,7 @@ stages:
     _TRACE: "${TRACE}"
   services:
     - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
-      command: ["--service", "docker", "2.3.3"]
+      command: ["--service", "docker", "2.4.0"]
     - name: $DOCKER_DIND_IMAGE
       alias: docker
       command: