chore: enable multi-platform Docker builds via buildx

Author: chenby

.github/workflows/docker.yml

@@ -8,12 +8,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - name: Docker check
+        uses: actions/checkout@v4
       - name: Create Tag
         run: |
           echo "RELEASE_TAG=`cat ./src/main/resources/.version`" >> $GITHUB_ENV
-      - name: Docker check
-        uses: actions/checkout@v4
       - name: Login to Docker Hub
         uses: docker/login-action@v3
         with: