gitlab-ci update

.gitlab-ci.yml

 image: docker:latest
 
 services:
-  - name: docker:19.03.1-dind
+  - name: docker:20.10.5-dind
     alias: docker
     command: ["--host=tcp://0.0.0.0:2375"]
 
@@ -10,6 +10,7 @@ variables:
   DOCKER_TLS_CERTDIR: "/certs"
   DOCKER_HOST: "tcp://docker:2375"
   DOCKER_BUILDKIT: 1
+  DOCKER_CLI_EXPERIMENTAL: "enabled"
 
 stages:
   - build
@@ -19,6 +20,8 @@ stages:
 before_script:
   - echo "Logging into GitLab Container Registry..."
   - docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" "$CI_REGISTRY"
+  - echo "Checking Docker availability..."
+  - docker info 
   - echo "Setting DNS server to 8.8.8.8"
   - echo "nameserver 8.8.8.8" > /etc/resolv.conf