Need to add security headers and CORS policies

[lukaslondono77]

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

[lukaslondono77]

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