Handled detection of http/https protocol also behind proxy

classes/Locator.php

@@ -27,7 +27,8 @@ class Locator {
     }
 
     public function getProtocol(): string {
-        return (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on') ? 'https://' : 'http://';
+        return (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on') ? 'https://' : (
+                isset($_SERVER['HTTP_X_FORWARDED_PROTO']) ? $_SERVER['HTTP_X_FORWARDED_PROTO'] . '://' : 'http://');
     }
 
     public function getBasePath(): string {