feat: Docker build with buildx for cross compilation (#191)

This PR simply updates the docker workflow to build both `linux/amd64`
and `linux/arm64` compatible containers

Author: drbh

.github/workflows/docker-build-push.yaml

@@ -27,6 +27,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -54,6 +57,7 @@ jobs:
         with:
           context: .
           file: ./dockerfiles/Dockerfile.user
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
@@ -74,6 +78,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -101,6 +108,7 @@ jobs:
         with:
           context: .
           file: ./dockerfiles/Dockerfile
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: ${{ steps.meta-root.outputs.tags }}
           labels: ${{ steps.meta-root.outputs.labels }}