Trim protocol from any URL served on API response

[tyohan]

Our API especially for some images served through HTTP protocol, this make some issue on our web app and AMP site because the content not fully served through secure protocol. So we need to filter dan remove all protocol of URL that serves from Shuvayatra server.

So instead http://api.shuvayatra.org/... it will serve //:api.shuvayatra.org/... then let browsers decided which protocol will use depend on what protocol the page access.

But to as a note, this could become an issue if we serve content from other servers which not support HTTPS protocol. But since our server supports it, all content from our server must serve through HTTPS.