FIX service worker path load

.storybook/preview.js

@@ -54,11 +54,12 @@ if (typeof global.process === 'undefined') {
 	// Start the mocking when each story is loaded.
 	// Repetitive calls to the `.start()` method do not register a new worker,
 	// but check whether there's an existing once, reusing it, if so.
+
+	const pathname = document.location.pathname.slice(0, document.location.pathname.lastIndexOf('/'));
 	worker.start({
 		serviceWorker: {
 			// Points to the custom location of the Service Worker file.
-
-			url: 'mockServiceWorker.js',
+			url: `${pathname}/mockServiceWorker.js`,
 			scope: '/',
 		},
 	});