Refactor Docker CI workflow

Author: ysdragon

.github/workflows/docker-image.yml

@@ -13,14 +13,18 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      matrix:
+        include:
+          - runner: ubuntu-latest
+            platform: linux/amd64
+          - runner: ubuntu-24.04-arm
+            platform: linux/arm64
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3.2.0
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -37,16 +41,64 @@ jobs:
         with:
           images: quay.io/ydrag0n/streambot
 
-      - name: Build and push
-        id: build-and-push
+      - name: Build and push by digest
+        id: build
         uses: docker/build-push-action@v6
         with:
           context: .
           file: Dockerfile
-          platforms: linux/amd64,linux/arm64
-          push: true
-          tags: quay.io/ydrag0n/streambot:latest,quay.io/ydrag0n/streambot:${{ github.ref_name }}
+          platforms: ${{ matrix.platform }}
           labels: ${{ steps.meta.outputs.labels }}
-          outputs: type=image,name=target
+          outputs: type=image,name=quay.io/ydrag0n/streambot,push-by-digest=true,name-canonical=true,push=true
           cache-from: type=gha
-          cache-to: type=gha,mode=max
+          cache-to: type=gha,mode=max
+          
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+          
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ matrix.platform == 'linux/amd64' && 'amd64' || 'arm64' }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+          
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        
+      - name: Login to Quay.io
+        uses: docker/login-action@v3
+        with:
+          registry: quay.io
+          username: ${{ secrets.QUAY_USERNAME }}
+          password: ${{ secrets.QUAY_ROBOT_TOKEN }}
+          
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5.5.1
+        with:
+          images: quay.io/ydrag0n/streambot
+          
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create \
+            --tag quay.io/ydrag0n/streambot:latest \
+            --tag quay.io/ydrag0n/streambot:${{ github.ref_name }} \
+            $(printf 'quay.io/ydrag0n/streambot@sha256:%s ' *)