speedup build

Author: eksrha

.github/workflows/build-image.yaml

@@ -1,8 +1,5 @@
 name: Build docker Image
 
-env:
-  IMAGE_PLATFORMS: linux/386,linux/amd64,linux/arm64,linux/arm/v7,linux/ppc64le
-
 on:
   workflow_dispatch:
   push:
@@ -29,6 +26,10 @@ jobs:
           echo "::set-output name=tag::$(git describe --abbrev=0)"
  
   build-image:
+    strategy:
+      matrix:
+        platforms: [linux/386,linux/amd64,linux/arm64,linux/arm/v7,linux/ppc64le]
+
     runs-on: ubuntu-latest
     needs: generate_tag
     steps:
@@ -45,7 +46,7 @@ jobs:
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v1
         with:
-          platforms: ${{ env.IMAGE_PLATFORMS }}
+          platforms: ${{ matrix.platforms }}
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v1
@@ -55,7 +56,7 @@ jobs:
         with:
           builder: ${{ steps.buildx.outputs.name }}
           context: ./docker-image/
-          platforms: ${{ env.IMAGE_PLATFORMS }}
+          platforms: ${{ matrix.platforms }}
           push: true
           tags: |
             ghcr.io/${{ github.repository }}:latest