Build Docker images for x86 and ARM architectures

.github/workflows/main.yml

@@ -20,7 +20,7 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Build and push Docker image
+      - name: Build and push Docker image for main
         uses: docker/build-push-action@v2
         with:
           context: .
@@ -28,6 +28,7 @@ jobs:
           tags: |
             ${{ secrets.DOCKERHUB_USERNAME }}/filekeeper:${{ github.ref_name }}
             ${{ secrets.DOCKERHUB_USERNAME }}/filekeeper:latest
+          platforms: linux/amd64,linux/arm64
         if: github.ref == 'refs/heads/main'
 
       - name: Build and push Docker image for staging
@@ -37,4 +38,5 @@ jobs:
           push: true
           tags: |
             ${{ secrets.DOCKERHUB_USERNAME }}/filekeeper:staging
+          platforms: linux/amd64,linux/arm64
         if: github.ref == 'refs/heads/staging'