feat(ci/docker/backend): Support arm64 (#401)

Author: jiriks74

.github/workflows/dockerPush.yml

@@ -22,6 +22,12 @@ jobs:
       - name: Check out the repo
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          # driver-opts: network=host
+          platforms: linux/amd64,linux/arm64
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v3.3.0
         with:
@@ -37,10 +43,12 @@ jobs:
       - name: Build and push Docker image
         uses: docker/build-push-action@v6.13.0
         with:
+          platforms: linux/amd64,linux/arm64
           context: Backend/
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+
   frontend:
     name: Build and push Frontend image
     runs-on: ubuntu-latest
@@ -53,7 +61,7 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
         with:
-          driver-opts: network=host
+          # driver-opts: network=host
           platforms: linux/amd64,linux/arm64
 
       - name: Log in to Docker Hub