ERR log如下：

2017-03-07T04:36:25.176632+00:00 app[web.1]: npm ERR!     node app.js
2017-03-07T04:36:25.176770+00:00 app[web.1]: npm ERR! You can get information on how to open an issue for this project with:
2017-03-07T04:36:25.176910+00:00 app[web.1]: npm ERR!     npm bugs skype-bot
2017-03-07T04:36:25.177042+00:00 app[web.1]: npm ERR! Or if that isn't available, you can get their info via:
2017-03-07T04:36:25.177178+00:00 app[web.1]: npm ERR!     npm owner ls skype-bot
2017-03-07T04:36:25.177312+00:00 app[web.1]: npm ERR! There is likely additional logging output above.
2017-03-07T04:36:25.181342+00:00 app[web.1]: 
2017-03-07T04:36:25.181742+00:00 app[web.1]: npm ERR! Please include the following file with any support request:
2017-03-07T04:36:25.181858+00:00 app[web.1]: npm ERR!     /app/npm-debug.log
2017-03-07T04:36:25.263538+00:00 heroku[web.1]: Process exited with status 1
2017-03-07T04:36:25.258542+00:00 heroku[web.1]: State changed from starting to crashed

狀況大概是我在heroku的deploy中，斷掉app在dropbox的連結後，又重新連結，之後，無論怎樣刪除資料夾，重連都無效。

處理方式：直接新建一個app，連結dropbox。