Add ijo42 latest workflow

.github/workflows/ci-publish-ijo42-latest.yml

+name: ci-publish-ijo42
+
+on:
+  push:
+    branches:
+      - ijo42
+
+jobs:
+  multi-registries:
+    runs-on: ubuntu-latest
+    if: github.ref == 'refs/heads/ijo42'
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2.3.4
+        with:
+          ref: ijo42
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.CR_PAT }}
+      -
+        name: Build and push
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          push: true
+          tags: |
+            ${{ secrets.DOCKERHUB_USERNAME }}/${{ secrets.DOCKERHUB_REPO }}:ijo42-latest
+            ghcr.io/${{ secrets.DOCKERHUB_USERNAME }}/${{ secrets.DOCKERHUB_REPO }}:ijo42-latest
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