use relative inline links for current host

src/server.php

@@ -341,12 +341,7 @@ $server->setHandler(
                     // Define base URL
                     $reader->setMacros(
                         '~URL:base~',
-                        sprintf(
+                        '/'
-                            'gemini://%s%s/%s',
-                            $config->gemini->server->host,
-                            $config->gemini->server->port == 1965 ? null : ':' . $config->gemini->server->port,
-                            '' // @TODO append relative prefix (:)
-                        )
                     );
 
                     // Define index menu