feat(admin): add add-music api

src/routes/index.js

@@ -1,5 +1,6 @@
 import { Router } from 'express';
 import authRoutes from './auths.js';
+import adminRoutes from './admins.js';
 
 const router = Router();
 
@@ -14,5 +15,6 @@ router.get('/health', (req, res) => {
 });
 
 router.use('/auth', authRoutes);
+router.use('/admin', adminRoutes);
 
 export default router;