Add comprehensive configuration documentation for _website

Co-authored-by: iaretechnician <2749183+iaretechnician@users.noreply.github.com>

_website/CONFIGURATION.md

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+# Website Configuration Guide
+
+## Overview
+
+The `_website` folder is now a standalone site with centralized database configuration. All database connection settings are managed in a single location: `includes/config.inc.php`.
+
+## Directory Structure
+
+```
+_website/
+├── includes/
+│   ├── config.inc.php    # Central database configuration
+│   └── README.md         # Documentation for includes directory
+├── db.php                # Database connection (loads config.inc.php)
+├── login.php             # Uses db.php
+├── logout.php            # Uses db.php
+├── cart.php              # Uses db.php
+├── order.php             # Uses db.php
+├── serverlist.php        # Uses db.php
+└── ...other files
+```
+
+## Configuration File
+
+### Location
+`_website/includes/config.inc.php`
+
+### Contents
+```php
+<?php
+$db_host="localhost";        // Database server hostname
+$db_user="localuser";        // Database username
+$db_pass="password";         // Database password
+$db_name="panel";            // Database name
+$table_prefix="ogp_";        // Table prefix
+$db_type="mysql";            // Database type
+?>
+```
+
+## How It Works
+
+1. **Configuration Loading**
+   - Website files include `db.php`
+   - `db.php` loads `includes/config.inc.php`
+   - Configuration variables are available to all files
+
+2. **Configuration Flow**
+   ```
+   includes/config.inc.php → db.php → website files
+   ```
+
+3. **Database Connection**
+   - `db.php` uses the configuration variables to establish a connection
+   - Returns `$db` variable containing the mysqli connection
+
+## Setup Instructions
+
+### For Standalone Use
+
+1. **Copy the _website folder** to your web server
+2. **Edit configuration**:
+   ```bash
+   nano _website/includes/config.inc.php
+   ```
+3. **Update database credentials**:
+   - Set `$db_host` to your database server
+   - Set `$db_user` to your database username
+   - Set `$db_pass` to your database password
+   - Set `$db_name` to your database name
+4. **Verify permissions**:
+   ```bash
+   chmod 600 _website/includes/config.inc.php
+   ```
+
+### For Panel Integration
+
+The configuration in `_website/includes/config.inc.php` should match the panel's configuration in `/includes/config.inc.php` to ensure both the website and panel access the same database.
+
+## Security Best Practices
+
+1. **File Permissions**: Set `config.inc.php` to read-only for the web server user
+   ```bash
+   chmod 600 includes/config.inc.php
+   ```
+
+2. **Web Server Configuration**: Ensure the `includes/` directory is not directly accessible via HTTP
+   ```apache
+   <Directory "/path/to/_website/includes">
+       Require all denied
+   </Directory>
+   ```
+
+3. **Backup Configuration**: Keep a secure backup of your configuration file
+
+## Troubleshooting
+
+### Connection Errors
+
+If you see database connection errors:
+
+1. **Verify credentials** in `includes/config.inc.php`
+2. **Check database server** is running
+3. **Verify database exists**
+4. **Check user permissions** in the database
+
+### File Not Found Errors
+
+If you see errors about missing `config.inc.php`:
+
+1. **Verify the file exists** at `_website/includes/config.inc.php`
+2. **Check file permissions** are readable by the web server
+3. **Verify path** in `db.php` uses `__DIR__` for relative paths
+
+### Include Errors
+
+If website files can't include `db.php`:
+
+1. **Check file paths** are correct
+2. **Verify `db.php`** exists in the `_website/` root
+3. **Check PHP include paths** in php.ini if needed
+
+## Migration from Old Configuration
+
+The old `db.php` had hardcoded credentials:
+```php
+// OLD (hardcoded)
+$servername = "panel.iaregamer.com";
+$username = "remoteuser";
+```
+
+The new `db.php` uses centralized config:
+```php
+// NEW (centralized)
+require_once(__DIR__ . '/includes/config.inc.php');
+$servername = $db_host;
+$username = $db_user;
+```
+
+**No changes needed** to files that include `db.php` - they work automatically with the new configuration.
+
+## Files Using Database Connection
+
+The following files include `db.php` and use the centralized configuration:
+- `login.php` - User authentication
+- `logout.php` - Session termination
+- `cart.php` - Shopping cart
+- `order.php` - Order processing
+- `serverlist.php` - Server listings
+- `adminserverlist.php` - Admin server management
+- `test_db_connection.php` - Database testing
+
+## Benefits
+
+1. **Single Source of Truth**: All database settings in one file
+2. **Easy Configuration**: Change settings in one place
+3. **Portable**: Copy folder and update one config file
+4. **Secure**: Configuration separate from code
+5. **Maintainable**: Easy to update and manage
+
+## Support
+
+For issues or questions about the configuration, please refer to:
+- `includes/README.md` - Detailed information about includes directory
+- Main project documentation
+- Panel configuration at `/includes/config.inc.php`