artifactregistry: add docker tag immutability config

mmv1/products/artifactregistry/Repository.yaml

@@ -46,6 +46,12 @@
       vars:
         repository_id: "my-repository"
         description: "example docker repository"
+    - !ruby/object:Provider::Terraform::Examples
+      name: "artifact_registry_repository_docker"
+      primary_resource_id: "my-repo"
+      vars:
+        repository_id: "my-repository"
+        description: "example docker repository"           
     - !ruby/object:Provider::Terraform::Examples
       name: "artifact_registry_repository_cmek"
       primary_resource_id: "my-repo"
@@ -135,6 +141,15 @@
       name: updateTime
       description: The time when the repository was last updated.
       output: true
+    - !ruby/object:Api::Type::NestedObject
+      name: 'dockerConfig'
+      description: |-
+        Docker repository config contains repository level configuration for the repositories of docker type.
+      properties:
+        - !ruby/object:Api::Type::Boolean
+          name: 'immutableTags'
+          description: |-
+            The repository which enabled this flag prevents all tags from being modified, moved or deleted. This does not prevent tags from being created.            
     - !ruby/object:Api::Type::NestedObject
       name: 'mavenConfig'
       description: |-

mmv1/templates/terraform/examples/artifact_registry_repository_docker.tf.erb

@@ -0,0 +1,10 @@
+resource "google_artifact_registry_repository" "<%= ctx[:primary_resource_id] %>" {
+  location      = "us-central1"
+  repository_id = "<%= ctx[:vars]['repository_id'] %>"
+  description   = "<%= ctx[:vars]['description'] %>"
+  format        = "DOCKER"
+
+  docker_config {
+    immutable_tags = true
+  }
+}