Use matrix to build

.github/workflows/docker.yml

@@ -5,29 +5,28 @@ on: push
 jobs:
   docker:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: [linux/amd64, linux/arm64]
     steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v4
-      -
-        name: Set up QEMU
+      - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
-      -
-        name: Set up Docker Buildx
+
+      - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
-      -
-        name: Login to DockerHub
+
+      - name: Login to DockerHub
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
-      -
-        name: Build and push
+
+      - name: Build and push
         uses: docker/build-push-action@v6
         with:
           file: .devcontainer/Dockerfile
           cache-from: type=gha
           cache-to: type=gha,mode=max
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ matrix.platform }}
           push: ${{ github.ref_name == 'main' }}
-          tags: ${{ github.repository_owner }}/dotfiles
+          tags: ${{ github.repository_owner }}/dotfiles:${{ matrix.platform }}