moving config to sample, with ignore for local config

.gitignore

@@ -0,0 +1 @@
+.config.php

config.php → config.sample.php

@@ -3,7 +3,7 @@
 
 // Site settings
 define('SITE_NAME', 'Feuerwehr Freising Test Shop');
-define('SITE_URL', ''); // Leave empty for relative URLs
+define('SITE_URL', '/shop'); // Leave empty for relative URLs
 
 // Disclaimer (placeholder text shown on start page)
 define('DISCLAIMER_LINES', [