Update README.md file

README.md

@@ -6,18 +6,27 @@ Environment requirements
 - NodeJS version 22 or latest
 - npm version 10.9.2 or latest
 
-First, run the development server:
+Environment variable
+- Make .env.local file in `root` folder
+```env
+  JWT_SECRET=your secret key
+```
+
+Install package
+```bash
+  npm install
+```
+
+Run the development server:
 
 ```bash
-npm run dev
+  npm run dev
 ```
 
 Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
 
 You can start editing the page by modifying `app/page.tsx`. The page auto-updates as you edit the file.
 
-This project uses [`next/font`](https://nextjs.org/docs/app/building-your-application/optimizing/fonts) to automatically optimize and load [Geist](https://vercel.com/font), a new font family for Vercel.
-
 ## Application features
 - Login
   - username: `admin`