update github remote build action to push to different container regi…

…stry

.github/workflows/docker.remotebuild.yml

@@ -7,7 +7,7 @@ on:
   workflow_dispatch:
 
 env:
-  REGISTRY: ghcr.io
+  REGISTRY: ${{ secrets.REGISTRY }}
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
@@ -22,12 +22,20 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v3
 
-      - name: Log in to the Container registry
-        uses: docker/login-action@f054a8b539a109f9f41c372932f1ae047eff08c9
+      - id: "auth"
+        name: "Authenticate to Google Cloud"
+        uses: "google-github-actions/auth@v1"
         with:
-          registry: ${{ env.REGISTRY }}
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
+          token_format: "access_token"
+          workload_identity_provider: ${{ secrets.GAR_WORKLOAD_IDENTITY_PROVIDER }}
+          service_account: ${{ secrets.GAR_SERVICE_ACCOUNT }}
+
+      - name: Login to GCR
+        uses: docker/login-action@v1
+        with:
+          registry: gcr.io
+          username: oauth2accesstoken
+          password: ${{ steps.auth.outputs.access_token }}
 
       - name: Generate docker tags/labels from github build context
         id: meta
@@ -45,10 +53,11 @@ jobs:
       - name: Build and push Docker image
         uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
         with:
+          secrets: |
+            "github_token=${{ secrets.GHUB_ACCESS_TOKEN }}"
           context: .
           file: ./Dockerfile.remotebuild
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           # org.opencontainers.image.version will match the tag name
           labels: ${{ steps.meta.outputs.labels }}
-