This will force SSL for applications using Fortrabbit domain name (*.frb.io) within a Shopify Proxy. If you ever find yourself using Fortrabbit on Laravel 5+ and building a Shopify Application, when initaiting your application or "snippet" with Laravel 5+ your proxy page will spit back a download option because you will be sending your headers with an "application/liquid" content type.
Use this in your .htaccess file, it will fix that shit up.– I spent weeks trouble shooting this utter faggotry.