Extend readme (#665)

Author: guibescos

governance/xc_admin/packages/xc_admin_frontend/README.md

@@ -5,20 +5,13 @@ This is a [Next.js](https://nextjs.org/) project bootstrapped with [`create-next
 First, run the development server:
 
 ```bash
+npm install
 npm run dev
-# or
-yarn dev
 ```
 
 Open [http://localhost:3000](http://localhost:3000) with your browser to see the result.
 
-You can start editing the page by modifying `pages/index.tsx`. The page auto-updates as you edit the file.
-
-[API routes](https://nextjs.org/docs/api-routes/introduction) can be accessed on [http://localhost:3000/api/hello](http://localhost:3000/api/hello). This endpoint can be edited in `pages/api/hello.ts`.
-
-The `pages/api` directory is mapped to `/api/*`. Files in this directory are treated as [API routes](https://nextjs.org/docs/api-routes/introduction) instead of React pages.
-
-This project uses [`next/font`](https://nextjs.org/docs/basic-features/font-optimization) to automatically optimize and load Inter, a custom Google Font.
+You can start editing the code. The page auto-updates as you edit the file.
 
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