更新 GitHub Actions 工作流，添加步骤名称的图标以增强可读性，并调整 Docker 登录步骤的密码注释。

.github/workflows/docker-build.yml

@@ -7,20 +7,20 @@ jobs:
   build-push:
     runs-on: ubuntu-latest
     steps:
-      - name: 拉取代码
+      - name: 拉取代码🔄
         uses: actions/checkout@v4
 
-      - name: Set up Docker Buildx
+      - name: Set up Docker Buildx🔧
         uses: docker/setup-buildx-action@v3
 
-      - name: 登录到Docker Registry
+      - name: 登录到Docker Registry💻
         uses: docker/login-action@v3
         with:
-          registry: your-registry.com  # 替换为自建 Registry 的地址
-          username: ${{ secrets.DOCKER_USER }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: your-registry.com
+          username: ${{ secrets.DOCKER_USER }}  # 如果需要用户名
+          password: ""  # 空密码
 
-      - name: 打包并发布镜像
+      - name: 打包并发布镜像📦
         uses: docker/build-push-action@v5
         with:
           context: .