Add boilerplate frontend_configurations controller

src/app.ts

@@ -13,6 +13,7 @@ import { emptyArrayController, emptyObjectController } from './controllers/api/f
 import { homeController } from './controllers/api/timelines.ts';
 import instanceController from './controllers/api/instance.ts';
 import { createTokenController, oauthAuthorizeController, oauthController } from './controllers/api/oauth.ts';
+import { frontendConfigController } from './controllers/api/pleroma.ts';
 import { preferencesController } from './controllers/api/preferences.ts';
 import { searchController } from './controllers/api/search.ts';
 import {
@@ -77,6 +78,8 @@ app.get('/api/v1/preferences', preferencesController);
 app.get('/api/v1/search', searchController);
 app.get('/api/v2/search', searchController);
 
+app.get('/api/pleroma/frontend_configurations', frontendConfigController);
+
 // Not (yet) implemented.
 app.get('/api/v1/notifications', emptyArrayController);
 app.get('/api/v1/bookmarks', emptyArrayController);

src/controllers/api/pleroma.ts

@@ -0,0 +1,7 @@
+import { type AppController } from '@/app.ts';
+
+const frontendConfigController: AppController = (c) => {
+  return c.json({});
+};
+
+export { frontendConfigController };