Review Application Configuration for Security Enhancements with GitHub Copilot

const appConfig = {
    'databaseURL': 'http://exampledb.com/data',
    'databasePassword': 'examplePassword123!',
    'debugMode': true,
    'allowedHosts': ['*'],
    'sessionTimeout': 30,
    'encryptionKeys': {
        'publicKey': 'examplePublicKey',
        'privateKey': 'examplePrivateKey'
    },
    'apiRateLimit': 100
};

The application configuration presents multiple areas for security enhancement:

1. **Database Connection**: The `databaseURL` uses HTTP, which is not secure. Change this to an HTTPS connection to ensure encrypted communication with the database.

2. **Hardcoded Credentials**: The `databasePassword` is hardcoded, which is a security risk. Store sensitive credentials securely using environment variables or a secrets management tool.

3. **Debug Mode**: The `debugMode` is set to true. Ensure that debug mode is disabled in production environments to prevent exposure of sensitive debug information.

4. **Allowed Hosts**: The `allowedHosts` configuration is set to allow all ('*'). Restrict this to only the domains that should have access to ensure that the application is not exposed to potentially malicious traffic.

5. **Session Timeout**: The `sessionTimeout` is relatively short at 30 minutes. While generally a good practice, ensure this setting aligns with the application's use case and user needs.

6. **Encryption Keys**: `publicKey` and `privateKey` appear to be hardcoded. Like passwords, encryption keys should not be hardcoded in the application's source code. Instead, use a secure storage solution.

7. **API Rate Limiting**: The `apiRateLimit` is set to 100 requests. While rate limiting is good practice, ensure that this value is configured based on the expected usage patterns and capacity to prevent denial of service to legitimate users.

Here is an example of a more secure application configuration:

```javascript
const appConfig = {
    'databaseURL': process.env.DATABASE_URL, // Use HTTPS and environment variables
    'databasePassword': process.env.DATABASE_PASSWORD,
    'debugMode': process.env.DEBUG_MODE === 'true', // Ensure false in production
    'allowedHosts': ['yourdomain.com'], // Specify allowed domains
    'sessionTimeout': 30, // Adjust based on user feedback and security needs
    'encryptionKeys': {
        'publicKey': process.env.PUBLIC_KEY,
        'privateKey': process.env.PRIVATE_KEY
    },
    'apiRateLimit': 100 // Adjust based on traffic analysis
};