去除buildx，添加metadata进行测试

.gitea/workflows/buid-push.yml

@@ -9,9 +9,20 @@ jobs:
       # 步骤1: 检出仓库代码
       - name: Checkout code
         uses: actions/checkout@v4  # 使用 Gitea 官方的 checkout action
-    
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+
+      # 为后端服务生成元数据
+      - name: Extract metadata for backend
+        uses: docker/metadata-action@v5
+        with:
+          images: gitea.zfxt.top/zfxt/backend
+          tags: |
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+            type=sha,prefix=,suffix=,enable=true
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
 
       # 步骤2: 登录到 Docker Registry (你的 Gitea 仓库)
       - name: Log in to Docker Registry
@@ -28,8 +39,9 @@ jobs:
           context: ./backend
           file: ./backend/dockerfile
           push: true
-          tags: |
-            gitea.zfxt.top/zfxt/bakend:v1.0
+          tags: ${{ steps.meta-backend.outputs.tags }}
+          labels: ${{ steps.meta-backend.outputs.labels }}
+