Add ARM64 image

Signed-off-by: GitHub <[email protected]>

.github/workflows/docker-hub.yml

@@ -12,33 +12,37 @@ jobs:
   push_to_registry:
     name: Push image to docker hub
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: [amd64, arm64]
     steps:
       - name: checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
 
       - name: Login to DockerHub
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
 
+      - name: Set tag
+        run: |
+          if [ "${{ matrix.platform }}" = "arm64" ]; then
+            echo "tag=ministryofjustice-fork-arm64" >> "$GITHUB_ENV"
+          else
+          echo "tag=ministryofjustice-fork" >> "$GITHUB_ENV"
+          fi
+
       - name: Build and push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v5
         with:
           push: true
-          tags: ministryofjustice/tech-docs-github-pages-publisher:ministryofjustice-fork
+          tags: ministryofjustice/tech-docs-github-pages-publisher:${{ env.tag }}
           build-args: |
             BUNDLE_RUBYGEMS__PKG__GITHUB__COM=${{ secrets.GITHUB_TOKEN }}
-
-      - name: Report failure to Slack
-        if: always()
-        uses: ravsamhq/notify-slack-action@v2
-        with:
-          status: ${{ job.status }}
-          notify_when: "failure"
-          notification_title: "Failed GitHub Action Run"
-        env:
-          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL }}