fix: 升级 Node 版本到 18，修复 sass 兼容性问题

🤖 Generated with Claude Code

.drone.yml

@@ -9,7 +9,7 @@ trigger:
 
 steps:
   - name: build
-    image: node:16-alpine
+    image: node:18-alpine
     environment:
       NODE_OPTIONS: --max-old-space-size=4096
     commands:
@@ -17,6 +17,16 @@ steps:
       - npm run build:h5
       - ls -la dist/build/h5/
 
+  - name: clean
+    image: appleboy/drone-ssh
+    settings:
+      host: 154.30.6.21
+      username: root
+      key:
+        from_secret: ssh_key
+      script:
+        - rm -rf /var/www/martial-admin-mini/*
+
   - name: deploy
     image: appleboy/drone-scp
     settings: