将应用程序与数据库连接后在heroku中出现应用程序错误

Question

         have this error in heroku

  at=error code=H10 desc="App crashed" method=GET path="/" host=fast-harbor- 
  35462.herokuapp.com request_id=f1f4f5f0-c81c-4737-bcff-edee57a46a90 
  fwd="103.252.27.4" dyno= connect= service= status=503 bytes= protocol=https
     2018-07-16T08:52:54.819939+00:00 heroku[router]: at=error code=H10 
      desc="App crashed" method=GET path="/favicon.ico" host=fast-harbor- 
 35462.herokuapp.com request_id=a4d4147d-5be2-4df3-af70-0f9e62423fa4 
 fwd="103.252.27.4" dyno= connect= service= status=503 bytes= protocol=https
    2018-07-16T09:06:08.348146+00:00 heroku[router]: at=error code=H10 
    desc="App crashed" method=GET path="/" host=fast-harbor- 
  35462.herokuapp.com request_id=0a3d56fd-2fc8-465a-bf21-76d328ea111f 
 fwd="103.252.27.4" dyno= connect= service= status=503 bytes= protocol=https
2018-07-16T09:06:11.117099+00:00 heroku[router]: at=error code=H10 desc="App 
 crashed" method=GET path="/favicon.ico" host=fast-harbor-35462.herokuapp.com 
      request_id=2a41b334-e4a9-4b25-a664-c3c4be2af6f0 fwd="103.252.27.4"       
     dyno= connect= service= status=503 bytes= protocol=https






  my package.json file is this

{     “ name”：“ nodeserver”，      “ version”：“ 1.0.0”，      “ description”：“”，      “ main”：“ index.js”，        “引擎”： {            “ node”：“ v9.3.0”，           “ npm”：“ 6.1.0”       }，           “脚本”：{            “ start”：“节点index.js”，            “ dev”：“ nodemon index.js”       }，        “ author”：“”，           “许可证”：“ ISC”，             “依赖关系”：{              “ cookie-session”：“ ^ 2.0.0-beta.3”，               “表达”：“ ^ 4.16.3”，                 “猫鼬”：“ ^ 5.2.3”，                “ nodemon”：“ ^ 1.18.1”，                     “ passport”：“ ^ 0.4.0”，                 “ passport-google-oauth20”：“ ^ 1.0.0”                      }                     }