.github/workflows/buildx.yml: check for latest tag

.github/workflows/buildx.yml

@@ -11,6 +11,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
@@ -26,6 +28,13 @@ jobs:
           echo "GITLAB_DIR=omnibus-gitlab" >> $GITHUB_ENV
           echo "DOCKER_DIR=omnibus-gitlab/docker" >> $GITHUB_ENV
           echo "GITLAB_REF_TAG=$(echo ${{ github.ref_name }} | sed 's/\-/\+/')" >> $GITHUB_ENV
+          DOCKER_NAMESPACE=yrzr/gitlab-ce-arm64v8
+          LATEST=$(git tag | sort -rV | head -n 1)
+          if [ "${LATEST}" == "${{ github.ref_name }}" ]; then 
+            echo "DOCKER_IMAGE_TAGS=${DOCKER_NAMESPACE}:$THIS_TAG,${DOCKER_NAMESPACE}:latest">> $GITHUB_ENV
+          else
+            echo "DOCKER_IMAGE_TAGS=${DOCKER_NAMESPACE}:$THIS_TAG">> $GITHUB_ENV
+          fi
       - name: Check out https://github.com/gitlabhq/omnibus-gitlab.git
         uses: actions/checkout@v3
         with:
@@ -47,4 +56,4 @@ jobs:
           context: ${{ env.DOCKER_DIR }}
           platforms: linux/arm64
           push: true
-          tags: yrzr/gitlab-ce-arm64v8:${{ github.ref_name }}
+          tags: ${{ env.DOCKER_IMAGE_TAGS }}