Configure CSP in an Ember CLI application which uses http-mock

I'm using http-mock with Ember CLI as suggested on http://ift.tt/1Osat0p. I understand the basic concept of CSP but I don't understand the configuration of it within an Ember CLI application.

How can I configure my application to either accept requests to localhost:4200/api/ to avoid this during development:

Content Security Policy violation: {"csp-report":{"document-
uri":"http://localhost:4200/products","referrer":"","violated-
directive":"style-src 'self'","effective-directive":"style-
src","original-policy":"default-src 'none'; script-src 'self' 
'unsafe-eval' localhost:35729 0.0.0.0:35729; font-src 'self'; 
connect-src 'self' ws://localhost:35729 ws://0.0.0.0:35729 
http://ift.tt/1HbOW6Y; img-src 'self'; style-src 
'self'; media-src 'self'; 
report-uri http://ift.tt/1HbOW6Y;","blocked-uri":"",
"source-file":
"chrome-extension://alelhddbbhepgpmgidjdcjakblofbmce",
"line-number":1,"column-number":20481,"status-code":200}}