Allow X-Forwarded-Proto to set the HTTPS flag

Author: TrafeX

config/nginx.conf

@@ -29,9 +29,9 @@ http {
     gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript application/javascript;
 
     # Forward the cloudfront scheme from upstream
-    map $http_cloudfront_forwarded_proto $forwarded_scheme {
+    map "$http_cloudfront_forwarded_proto$http_x_forwarded_proto" $forwarded_scheme {
          default off;
-         https on;
+         "~*(https)" on;
      }
 
     server {