add multiplatform build

.github/workflows/docker_push.yaml

@@ -3,31 +3,41 @@ name: "Publish Ubuntu images"
 on:
   release:
     types: [published]
+  push:
+    branches: [ feature/docker_push ]
 
 jobs:
   push_to_registries:
-    name: Push Docker image to multiple registries
     runs-on: self-hosted
     permissions:
       packages: write
       contents: read
     strategy:
       matrix:
         version: [16, 18, 20]
+    name: Push Ubuntu ${{ matrix.version }}.04 Docker image
     steps:
-      - name: Check out the repo
+      - 
+        name: Check out the repo
         uses: actions/checkout@v4
-
-      - name: Log in to Docker Hub
+      - 
+        name: Log in to Docker Hub
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
-
-      - name: Build and push Docker images
+      - 
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+      - 
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - 
+        name: Build and push Docker images
         uses: docker/build-push-action@v5
         with:
           context: .
           file: Dockerfile_ros1_${{ matrix.version }}_04
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ vars.DOCKER_HUB_REPOSITORY }}/kalibr:${{ matrix.version }}.04