Attempt to build both x86_64 and arm64 docker images.

.github/workflows/docker.yml

@@ -5,8 +5,22 @@ on: [push]
 jobs:
   build:
     runs-on: ubuntu-latest
-
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+	  
     steps:
+    - name: Prepare
+      run: |
+        platform=${{ matrix.platform }}
+        echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV          
+
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v3
+
     - uses: actions/checkout@v3
 
     - name: Exit if not on devel branch
@@ -19,6 +33,8 @@ jobs:
     - name: Build Docker image
       uses: docker/build-push-action@v4
       with:
+        platforms: ${{ matrix.platform }}
+        labels: ${{ steps.meta.outputs.labels }}
         context: .
         file: docker/Dockerfile
         push: false