Heroku部署失败

Question

我已经创建了一个React应用程序，并且在我的localhost：3000上运行正常，但是在尝试将其部署到Heroku时失败了。 我显示的错误：

DelayReturnToHomePage = (e) => {

  setTimeout(() => {
    this.props.history.push({
      pathname: '/'
    }) 

  }, 1700)
}

handleSaveData(){

  this.setState({
    saveDataClicked: 'yes'
  })

  if(this.state.live == 1)
  {

    fetch(`http://ca-fpscfb2:4000/SaveDataRedFlags?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&redFlags=${Base64.encode(this.state.redFlagContent)}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataMaintenanceReleases?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&maintenanceReleases=${Base64.encode(this.state.maintenanceContent)}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataNotes?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&notes=${Base64.encode(this.state.notesContent)}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataStatus?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&status=${Base64.encode(this.state.selectedOption.value)}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataSummary?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&summary=${this.state.summaryLiveOn}`) && 
    fetch(`http://ca-fpscfb2:4000/SaveDataStatusColor?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&statuscolor=${this.state.selectedOption.label}`)  
    .then( 
      this.setState({showSaveModal: true}),
      setTimeout(() => {
        this.handleSaveDataHide();
      }, 3000)
    )
  }
  else
  {
    fetch(`http://ca-fpscfb2:4000/SaveDataRedFlags?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&redFlags=${Base64.encode(this.state.redFlagContent)}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataMaintenanceReleases?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&maintenanceReleases=${Base64.encode(this.state.maintenanceContent)}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataNotes?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&notes=${Base64.encode(this.state.notesContent)}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataStatus?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&status=${Base64.encode(this.state.selectedOption.value)}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataSummary?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&summary=${this.state.summaryLiveOff}`) &&
    fetch(`http://ca-fpscfb2:4000/SaveDataStatusColor?dashboardID=${this.state.dashboardID}&airlineID=${this.state.airlineID}&statuscolor=${this.state.selectedOption.label}`) 
    .then( 
      this.setState({showSaveModal: true}),
      setTimeout(() => {
        this.handleSaveDataHide();
      }, 3000)
    )
  }
}

我的heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=stark-wave-46792.herokuapp.com request_id=bcf25382-90d2-4d27-a4ff-423bd990c864 fwd="103.242.197.11" dyno= connect= service= status=503 bytes= protocol=https 脚本如下：

package.json

我的server.js看起来像这样：