Enable file change monitoring

[Genyus]

Summary

As an administrator, I want to monitor any file changes so that I can quickly respond to any unauthorised modifications

Acceptance Criteria

Scenario: Website files are changed outside of deployments

Given that a deployment is not being executed
When one or more files are modified
Then I receive an email notification detailing the detected change

Scenario: Websites files are changed during deployment

Given that a deployment is being executed
When one or more files are modified
Then no notifications are sent

Additional context

See Website File Changes Monitor