Implemented Electron packaging support

main.js

@@ -0,0 +1,35 @@
+const {app, BrowserWindow} = require('electron');
+const path = require('path');
+const url = require('url');
+
+let win;
+
+function createWindow () {
+    win = new BrowserWindow({width: 975, height: 600, minHeight: 300, minWidth: 975});
+
+    win.loadURL(url.format({
+        pathname: path.join(__dirname, 'index.html'),
+        protocol: 'file:',
+        slashes: true
+    }));
+
+    win.openDevTools();
+
+    win.on('closed', () => {
+        win = null
+    })
+}
+
+app.on('ready', createWindow);
+
+app.on('window-all-closed', () => {
+    if (process.platform !== 'darwin') {
+        app.quit()
+    }
+});
+
+app.on('activate', () => {
+    if (win === null) {
+        createWindow()
+    }
+});