feat(Dind): Test dind containers

test/docker/test-dind.gitlab-ci.yml

@@ -5,6 +5,7 @@ services:
   - name: docker:dind
     # explicitly disable tls to avoid docker startup interruption
     command: [ "--tls=false" ]
+    alias: docker
 
 variables:
   # Instruct Testcontainers to use the daemon of DinD.
@@ -15,7 +16,7 @@ variables:
   DOCKER_DRIVER: overlay2
 
 Test-Simple-Dind:
-  image: docker
+  image: docker:stable
   stage: verify
   script:
     - docker run -t alpine echo test