ci: speed up docker image build

Signed-off-by: JohnsonRan <me@ihtw.moe>

.github/workflows/docker-image.yml

@@ -4,18 +4,39 @@ on:
   push:
     branches:
       - main
+    paths-ignore:
+      - '**.md'
+  pull_request:
+    branches:
+      - main
+    paths-ignore:
+      - '**.md'
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: write
+  packages: write
+  actions: write
 
 jobs:
-  build-and-push:
-    runs-on: ubuntu-latest
+  build:
+    strategy:
+      matrix:
+        include:
+          - platform: linux/amd64
+            os: ubuntu-latest
+          - platform: linux/arm64
+            os: ubuntu-24.04-arm
+    runs-on: ${{ matrix.os }}
 
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4
 
-      - name: Set up QEMU (多架构构建支持)
-        uses: docker/setup-qemu-action@v2
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
@@ -30,19 +51,93 @@ jobs:
         id: lowercase
         run: echo "owner=$(echo '${{ github.repository_owner }}' | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
 
-      - name: Build and push
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ steps.lowercase.outputs.owner }}/moontv
+          tags: |
+            type=ref,event=pr
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Build and push by digest
+        id: build
         uses: docker/build-push-action@v5
         with:
           context: .
           file: ./Dockerfile
-          push: true
-          platforms: linux/amd64,linux/arm64
-          tags: |
-            ghcr.io/${{ steps.lowercase.outputs.owner }}/moontv:latest
-            ghcr.io/${{ steps.lowercase.outputs.owner }}/moontv:${{ github.sha }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=ghcr.io/${{ steps.lowercase.outputs.owner }}/moontv,push-by-digest=true,name-canonical=true,push=${{ github.event_name != 'pull_request' }}
 
+      - 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-${{ strategy.job-index }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    if: github.event_name != 'pull_request'
+    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 GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set lowercase repository owner
+        id: lowercase
+        run: echo "owner=$(echo '${{ github.repository_owner }}' | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ steps.lowercase.outputs.owner }}/moontv
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=sha
+            type=raw,value=latest,enable={{is_default_branch}}
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf 'ghcr.io/${{ steps.lowercase.outputs.owner }}/moontv@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ghcr.io/${{ steps.lowercase.outputs.owner }}/moontv:${{ steps.meta.outputs.version }}
+
+  cleanup:
+    runs-on: ubuntu-latest
+    needs:
+      - merge
+    if: always() && github.event_name != 'pull_request'
+    steps:
       - name: Delete workflow runs
         uses: Mattraks/delete-workflow-runs@main
         with: