Need to add security headers and CORS policies

As a service provider I need my service to use security headers and CORS policies So that my web site is not vulnerable to CORS attacks

#### Assumptions

* Flask-Talisman will be used for security headers
* Flask-Cors will be used to establish cross-origin resource sharing (CORS) policies

#### Acceptance Criteria


    Given the site is secured
    When a REST API request is made
    Then secure headers and a CORS policy should be returned

OrlanAlex / devops-capstone-project

Need to add security headers and CORS policies #13