Update main.js

Add an IPC handler

main.js

@@ -1,5 +1,5 @@
 // Importing modules
-const { app, BrowserWindow } = require('electron')
+const { app, BrowserWindow, ipcMain } = require('electron')
 const path = require('path')
 
 // Reusable function to instantiate windows
@@ -11,7 +11,7 @@ const createWindow = () => {
             preload: path.join(__dirname, 'preload.js'),
         }
     })
-
+    ipcMain.handle('ping', () => 'pong')
     win.loadFile('index.html')
 }