Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -11,7 +11,7 @@ variables:
   DOCKERHUB_REPO: "$DOCKER_USERNAME/teledatastream"  # set repo name
 
 .build_template:
-  tags: ["ubuntu","vm"]  # match your runner tags
+  tags: ["docker"]  # match your runner tags
   before_script:
     - echo "Docker CLI info:"
     - docker version
@@ -75,7 +75,9 @@ diag:
 
 build:
   stage: build
-  image: docker:24.0.9
+  image: docker:20.10.16
+  services:
+    - docker:20.10.16
   extends: .build_template
   before_script:
     - echo "Building Docker image for commit:" ${CI_COMMIT_SHORT_SHA}
@@ -99,7 +101,9 @@ build:
     
 deploy:
   stage: deploy
-  image: docker:25.0.0
+  image: docker:20.10.16
+  services:
+    - docker:20.10.16
   extends: .build_template
   script:
     - echo "$DOCKER_TOKEN" | docker login -u "$DOCKER_USERNAME" --password-stdin