It all works....

src/desktop/main.js

@@ -0,0 +1,30 @@
+const { app, BrowserWindow } = require('electron');
+const path = require('path');
+
+function createWindow() {
+    const win = new BrowserWindow({
+        width: 800,
+        height: 600,
+        webPreferences: {
+            preload: path.join(__dirname, 'preload.js'),
+        }
+    });
+
+    win.loadFile(path.join(__dirname, '../../public/index.html'));
+}
+
+app.whenReady().then(() => {
+    createWindow();
+
+    app.on('activate', function() {
+        if (BrowserWindow.getAllWindows().length === 0) {
+            createWindow();
+        }
+    })
+});
+
+app.on('window-all-close', function() {
+    if (process.platform !== 'darwin') {
+        app.quit();
+    }
+});