fix: 使用 container 指定 PHP 镜像

- test.yml / ci.yml: 使用 composer:latest 镜像 (含 PHP)
- deploy.yml: 使用 alpine:latest 镜像 + SSH 密钥配置
- 解决 runner 默认环境缺少 PHP 的问题

.gitea/workflows/deploy.yml

@@ -19,12 +19,25 @@ jobs:
   deploy-staging:
     name: 部署测试环境
     runs-on: linux
+    container:
+      image: alpine:latest
     if: github.ref == 'refs/heads/develop'
     steps:
+      - name: 安装依赖
+        run: apk add --no-cache openssh-client bash
+
+      - name: 设置 SSH 密钥
+        run: |
+          mkdir -p ~/.ssh
+          echo "${{ secrets.DEPLOY_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed255
+          echo "Host micecola.top" >> ~/.ssh/config
+          echo "    StrictHostKeyChecking no" >> ~/.ssh/config
+
       - name: 部署到测试服务器
         run: |
           echo "开始部署到测试环境..."
-          ssh -o StrictHostKeyChecking=no root@micecola.top << 'EOF'
+          ssh root@micecola.top << 'EOF'
             cd /var/www/kb-web-test
             
             # 备份
@@ -53,12 +66,25 @@ jobs:
   deploy-production:
     name: 部署正式环境
     runs-on: linux
+    container:
+      image: alpine:latest
     if: github.ref == 'refs/heads/main'
     steps:
+      - name: 安装依赖
+        run: apk add --no-cache openssh-client bash
+
+      - name: 设置 SSH 密钥
+        run: |
+          mkdir -p ~/.ssh
+          echo "${{ secrets.DEPLOY_KEY }}" > ~/.ssh/id_ed25519
+          chmod 600 ~/.ssh/id_ed255
+          echo "Host micecola.top" >> ~/.ssh/config
+          echo "    StrictHostKeyChecking no" >> ~/.ssh/config
+
       - name: 备份并部署
         run: |
           echo "开始部署到正式环境..."
-          ssh -o StrictHostKeyChecking=no root@micecola.top << 'EOF'
+          ssh root@micecola.top << 'EOF'
             # 备份
             BACKUP_DIR="/var/www/kb-web-prod-backups"
             mkdir -p $BACKUP_DIR