fix: 使用本地专用镜像 gitea-runner-php

- 创建 Dockerfile 包含 PHP + Node.js + Git + SSH
- 所有 workflow 使用本地镜像避免拉取延迟
- 需要先构建镜像: docker build -t gitea-runner-php:latest .

.gitea/workflows/test.yml

@@ -12,11 +12,10 @@ jobs:
     name: 快速测试
     runs-on: linux
     container:
-      image: composer:latest
+      image: gitea-runner-php:latest
     steps:
       - name: 检出代码
         run: |
-          apk add --no-cache git
           git clone -b ${{ github.ref_name }} ${{ github.server_url }}/${{ github.repository }}.git .
           git checkout ${{ github.sha }}
 
@@ -24,6 +23,7 @@ jobs:
         run: |
           echo "PHP: $(php -v | head -1)"
           echo "Composer: $(composer --version)"
+          echo "Node: $(node -v)"
 
       - name: PHP 语法检查
         run: |