fix: update documentation

README.md

@@ -12,6 +12,7 @@ PayLink is a payment organizer and an open source alternative to Paynest.
 - ✅ Add a hero section with a photo, name and description to introduce yourself or your brand
 - ✅ Include up to 18 links to your social media accounts
 - ✅ Add up to 14 payment methods
+- ✅ Add a Google Analytics ID to track your analytics
 - ✅ The users can copy or generate QRCode for each payment method
 - ✅ The users can use the search bar to look for a specific payment method
 
@@ -389,6 +390,16 @@ The Payment section supports:
 - XRP
 - A card
 
+### Theme
+
+You can add your Google Analytics ID in the `googleAnalyticsId` property.
+
+For example:
+
+```js
+    "googleAnalyticsId": "G-SOMEID"
+```
+
 ## How to deploy
 
 ### Deploy on GitHub Pages

src/App.jsx

@@ -35,6 +35,7 @@ const App = () => {
   // Set theme
   document.body.setAttribute("data-theme", Config.theme);
 
+  // Set Google Analytics ID
   const script = document.querySelectorAll("script")[2];
   script.setAttribute(
     "src",