Stopping all local servers when leaving application

main.js

@@ -59,13 +59,14 @@ function createWindow () {
   }
 
   // Emitted when the window is closed.
-  mainWindow.on('closed', function () {
+  mainWindow.on('closed',async function () {
     // Dereference the window object, usually you would store windows
     // in an array if your app supports multi windows, this is the time
     // when you should delete the corresponding element.
     mainWindow = null
   });
 
+
   // forward event to renderer
   electron.ipcMain.on('local-server-status-events', (event) => {
     mainWindow.webContents.send('local-server-status-events', event);