Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -18,17 +18,10 @@
 default:
   image: docker:dind
   services:
-    - name: registry.hub.docker.com/library/docker:dind
+    - name: docker:dind
       alias: docker
   before_script:
     - docker info
-variables:
-  DOCKER_TLS_CERTDIR: "/certs"
-  # These are usually specified by the entrypoint, however the
-  # Kubernetes executor doesn't run entrypoints
-  # https://gitlab.com/gitlab-org/gitlab-runner/-/issues/4125
-  DOCKER_TLS_VERIFY: 1
-  DOCKER_CERT_PATH: "$DOCKER_TLS_CERTDIR/client"
 stages:          # List of stages for jobs, and their order of execution
   - build
   - test