Update README.md

Author: Keillion

barcode-scanner-api-samples/scan-single-barcode/electron/README.md

@@ -8,6 +8,20 @@ This sample demonstrates how to use the `BarcodeScanner` API from the [Dynamsoft
 - Renders barcodeScanner inside a container
 - Scans one barcode at a time from video
 
+## 🚀 Quick Start
+
+### 1. Install Dependencies
+
+```bash
+npm install
+```
+
+### 2. Start the App
+
+```bash
+npm run start
+```
+
 ## 📌 Customization
 
 Please refer to sample [`scan-multiple-barcodes`](https://github.com/Dynamsoft/barcode-reader-javascript-samples/tree/main/barcode-scanner-api-samples/scan-multiple-barcodes) or check the official [documentation](https://dynamsoft.com/barcode-reader/docs/web/programming/javascript/user-guide/barcode-scanner-customization.html).