Read more https://help.heroku.com/J2R1S4T8/can-heroku-force-an-application-to-use-ssl-tls https://stackoverflow.com/questions/26489519/how-to-redirect-to-https-with-htaccess-on-heroku-cedar-stack https://www.siteground.com/kb/how-to-force-ssl-with-htaccess/ https://webmasters.stackexchange.com/questions/28395/how-to-prevent-access-to-website-without-ssl-connection
Read more
https://help.heroku.com/J2R1S4T8/can-heroku-force-an-application-to-use-ssl-tls
https://stackoverflow.com/questions/26489519/how-to-redirect-to-https-with-htaccess-on-heroku-cedar-stack
https://www.siteground.com/kb/how-to-force-ssl-with-htaccess/
https://webmasters.stackexchange.com/questions/28395/how-to-prevent-access-to-website-without-ssl-connection