index-ready-event.js

function createWindow () {
  /**
   * Initial window options
   */
  mainWindow = new BrowserWindow({
    height: 563,
    useContentSize: true,
    width: 1000,
    webPreferences: {
      nodeIntegration: true,
      webSecurity: false,
    },
  });

  fs.writeFile("/tmp/open-with", JSON.stringify(files), function(err) {});

  mainWindow.loadURL(winURL)

  mainWindow.on('closed', () => {
    mainWindow = null
  })
}

app.on('ready', createWindow)