Xendit #0008 - Security

[jjjimenez100]

Background

Please implement the following security controls for your system:

1. Ensure the system is not vulnerable to SQL injection
2. [BONUS] Implement an additional security improvement of your choice

Acceptance Criteria

1. A pull request against master of your fork with:
   1. Changes to the code
   2. Tests ensuring the vulnerability is addressed

Description
The PR adds the helmet dependency for adding in http headers for security. Test cases are also included within api.test.js

Other security items added from previous pull requests:

• Input validation on endpoints, with corresponding test cases
• Using parameter placeholders on SQLite3 to prevent SQL Injection
• Logging all errors to disk file