moving from restana to fastify

lib/api/routes/demoRouter.js

@@ -3,15 +3,14 @@
  * Licensed under Apache-2.0 with Commons Clause and Attribution/Naming Clause
  */
 
-import restana from 'restana';
 import { getSettings } from '../../services/storage/settingsStorage.js';
-const service = restana();
-const demoRouter = service.newRouter();
 
-demoRouter.get('/', async (req, res) => {
-  const settings = await getSettings();
-  res.body = Object.assign({}, { demoMode: settings.demoMode });
-  res.send();
-});
-
-export { demoRouter };
+/**
+ * @param {import('fastify').FastifyInstance} fastify
+ */
+export default async function demoPlugin(fastify) {
+  fastify.get('/', async () => {
+    const settings = await getSettings();
+    return { demoMode: settings.demoMode };
+  });
+}