Add GitHub Pages setup guide

docs/GITHUB_PAGES_SETUP.md

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+# GitHub Pages Setup for Token List
+
+**Date**: $(date)  
+**Repository**: [Defi-Oracle-Meta-Blockchain/metamask-integration](https://github.com/Defi-Oracle-Meta-Blockchain/metamask-integration)  
+**Purpose**: Enable GitHub Pages to host the MetaMask token list
+
+---
+
+## 🚀 Quick Setup
+
+### Step 1: Enable GitHub Pages
+
+1. Go to repository Settings
+2. Navigate to **Pages** (left sidebar)
+3. Under **Build and deployment** → **Source**:
+   - Select **Branch**: `main`
+   - Select **Folder**: `/ (root)` or `/docs`
+   - Click **Save**
+
+### Step 2: Verify Token List Location
+
+The token list is located at:
+- **Path**: `config/token-list.json`
+- **URL after Pages enabled**: 
+  - If root: `https://defi-oracle-meta-blockchain.github.io/metamask-integration/config/token-list.json`
+  - If /docs: `https://defi-oracle-meta-blockchain.github.io/metamask-integration/config/token-list.json` (same)
+
+### Step 3: Wait for Deployment
+
+- GitHub Pages typically deploys within 1-2 minutes
+- Check deployment status in **Actions** tab
+- Green checkmark = deployed successfully
+
+---
+
+## 📋 Configuration Options
+
+### Option 1: Root Directory (Recommended)
+
+**Settings**:
+- Branch: `main`
+- Folder: `/ (root)`
+
+**Token List URL**:
+```
+https://defi-oracle-meta-blockchain.github.io/metamask-integration/config/token-list.json
+```
+
+**Pros**:
+- Simple structure
+- Direct access to all files
+- Works immediately
+
+### Option 2: /docs Directory
+
+**Settings**:
+- Branch: `main`
+- Folder: `/docs`
+
+**Note**: If using /docs, you may need to move `config/token-list.json` to `docs/config/token-list.json` or create a symlink.
+
+**Pros**:
+- Keeps source files separate
+- Standard GitHub Pages structure
+
+---
+
+## ✅ Verification
+
+### Test Token List URL
+
+After enabling Pages, test the URL:
+
+```bash
+curl -I https://defi-oracle-meta-blockchain.github.io/metamask-integration/config/token-list.json
+```
+
+**Expected Response**:
+```
+HTTP/2 200
+Content-Type: application/json
+```
+
+### Validate JSON
+
+```bash
+curl https://defi-oracle-meta-blockchain.github.io/metamask-integration/config/token-list.json | jq .
+```
+
+Should return valid JSON without errors.
+
+---
+
+## 🔧 Adding to MetaMask
+
+Once GitHub Pages is enabled and the token list is accessible:
+
+1. Open MetaMask
+2. Go to **Settings** → **Security & Privacy** → **Token Lists**
+3. Click **Add custom token list**
+4. Enter URL:
+   ```
+   https://defi-oracle-meta-blockchain.github.io/metamask-integration/config/token-list.json
+   ```
+5. Click **Add**
+
+MetaMask will automatically import all tokens from the list.
+
+---
+
+## 📝 CORS Headers
+
+GitHub Pages automatically sets proper CORS headers for JSON files, so no additional configuration is needed.
+
+---
+
+## 🔄 Updating the Token List
+
+When you update `config/token-list.json`:
+
+1. Commit changes to `main` branch
+2. Push to GitHub
+3. GitHub Pages automatically rebuilds (1-2 minutes)
+4. New version is immediately available
+
+**Note**: Update the `version` field in the token list JSON when making changes.
+
+---
+
+## 🎯 Current Token List
+
+**File**: `config/token-list.json`
+
+**Tokens Included**:
+- ETH/USD Price Feed (`0x3304b747e565a97ec8ac220b0b6a1f6ffdb837e6`)
+- WETH9 (`0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2`)
+- WETH10 (`0xf4BB2e28688e89fCcE3c0580D37d36A7672E8A9f`)
+
+---
+
+## ✅ Checklist
+
+- [ ] Enable GitHub Pages in repository settings
+- [ ] Select branch: `main`
+- [ ] Select folder: `/ (root)` or `/docs`
+- [ ] Wait for deployment (check Actions tab)
+- [ ] Verify token list URL is accessible
+- [ ] Test JSON validation
+- [ ] Add URL to MetaMask token lists
+- [ ] Verify tokens appear in MetaMask
+
+---
+
+## 🔗 Related Documentation
+
+- [Token List Hosting Guide](./METAMASK_TOKEN_LIST_HOSTING.md)
+- [Quick Start Guide](./METAMASK_QUICK_START_GUIDE.md)
+
+---
+
+**Last Updated**: $(date)
+