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README.md

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+# AyrisTech WhatsApp Gateway
+
+A simple WhatsApp Gateway worker using `whatsapp-web.js` and `express`.
+
+## Features
+- QR Code generation for authentication
+- Message sending via HTTP POST
+- Multi-user support via LocalAuth
+
+## Setup
+1. Clone the repository
+2. Run `npm install`
+3. Copy `.env.example` to `.env` and configure your settings
+4. Run `npm start`
+
+## API
+### Send Message
+**POST** `/send-message`
+```json
+{
+  "secret": "your_webhook_secret",
+  "userId": "unique_user_id",
+  "to": "phone_number",
+  "message": "your_message"
+}
+```