Update .gitlab-ci.yml so it can be used with group runners

.gitlab-ci.yml

@@ -4,29 +4,33 @@ stages:
 variables:
   IMAGE_PATH: "${CI_REGISTRY_IMAGE}"
 
-
 .build: &build
     stage: build
-    tags:
-      - shell-builder
+    image: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/docker:latest
+    services:
+      - name: ${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/docker:latest
+        alias: docker
     variables:
         TAG: $CI_COMMIT_SHA
+        DOCKER_TLS_CERTDIR: "/certs"
+    before_script:
+      - apk add git
+      - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+      - docker login -u $CI_DEPENDENCY_PROXY_USER -p $CI_DEPENDENCY_PROXY_PASSWORD $CI_DEPENDENCY_PROXY_SERVER
     needs: []
 
-build-ekms-ubuntu:
+build-gnmi-target-ubuntu:
     script:
-        - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
         - TAG=${CI_COMMIT_BRANCH//\//-}
         - IMAGE_NAME="$IMAGE_PATH/ubuntu"
-        - docker buildx build -t "$IMAGE_NAME:$TAG" -f Dockerfile --target "ubuntu" .
+        - docker buildx build -t "$IMAGE_NAME:$TAG" -f Dockerfile --target "ubuntu" --build-arg "GITLAB_PROXY=${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/" .
         - docker push "$IMAGE_NAME:$TAG"
     <<: *build
 
-build-ekms-debian:
+build-gnmi-target-debian:
     script:
-        - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
         - TAG=${CI_COMMIT_BRANCH//\//-}
         - IMAGE_NAME="$IMAGE_PATH/debian"
-        - docker buildx build -t "$IMAGE_NAME:$TAG" -f Dockerfile --target "debian" .
+        - docker buildx build -t "$IMAGE_NAME:$TAG" -f Dockerfile --target "debian" --build-arg "GITLAB_PROXY=${CI_DEPENDENCY_PROXY_GROUP_IMAGE_PREFIX}/" .
         - docker push "$IMAGE_NAME:$TAG"
     <<: *build