feat(drone): add debug step to deployment script for troubleshooting

- Introduced a new debug step in the .drone.yml file to output the current PATH, user, and locations of Node.js and PM2.
- This addition aims to assist in troubleshooting deployment issues by providing visibility into the environment configuration during the CI/CD process.

.drone.yml

@@ -11,6 +11,12 @@ trigger:
     - push
 
 steps:
+  - name: debug
+    commands:
+      - echo $PATH
+      - whoami
+      - which node
+      - which pm2
   - name: deploy
     environment:
       # exec runner 常不设置 HOME，会导致 ~/.bun、~/.nvm 等路径展开错误