docs: adds overview for react-dapp-v2

dapps/react-dapp-v2/README.md

@@ -1,6 +1,19 @@
-# WalletConnect React App
+# React dApp (with standalone v2 client)
 
-## Getting Started
+🔗 Live dapp demo - https://react-dapp-v2.vercel.app <br />
+🔗 Live wallet demo - https://react-wallet-v2.vercel.app <br />
+📚 WalletConnect v2 Docs - https://docs.walletconnect.com/2.0
+
+## Overview
+
+This is an example implementation of a React dApp (generated via `create-react-app`) using the standalone
+client for WalletConnect v2 to:
+
+- handle pairings
+- manage sessions
+- send JSON-RPC requests to a paired wallet
+
+## Running locally
 
 Install the app's dependencies:
 
@@ -14,6 +27,11 @@ Set up your local environment variables by copying the example into your own `.e
 cp .env.local.example .env.local
 ```
 
+Your `.env.local` now contains the following environment variables:
+
+- `REACT_APP_PROJECT_ID` (placeholder) - You can generate your own ProjectId at https://cloud.walletconnect.com
+- `REACT_APP_RELAY_URL` (already set)
+
 ## Develop
 
 ```bash