update gh action

.github/workflows/build.yml

@@ -7,6 +7,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: [linux/amd64, linux/arm64]
     steps:
       - uses: actions/checkout@v4
         name: Checkout
@@ -25,12 +28,44 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
 
+      - name: Extract platform for tagging
+        id: platform
+        run: |
+          platform_clean=$(echo "${{ matrix.platform }}" | tr '/' '-')
+          echo "clean=${platform_clean}" >> $GITHUB_OUTPUT
+
       - uses: docker/build-push-action@v4
         with:
           context: .
           push: true
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ matrix.platform }}
-          tags: ${{ steps.meta.outputs.tags }}
+          tags: ${{ steps.meta.outputs.tags }}-${{ steps.platform.outputs.clean }}
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
+          cache-from: type=gha,scope=${{ steps.platform.outputs.clean }}
-          cache-to: type=gha,mode=max
+          cache-to: type=gha,mode=max,scope=${{ steps.platform.outputs.clean }}
+
+  create-manifest:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: mii443
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/metadata-action@v4
+        id: meta
+        with:
+          images: ghcr.io/mii443/ncb-tts-r2
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+      
+      - name: Create and push manifest
+        run: |
+          for tag in ${{ steps.meta.outputs.tags }}; do
+            docker manifest create $tag \
+              ${tag}-linux-amd64 \
+              ${tag}-linux-arm64
+            docker manifest push $tag
+          done