add delete feature

start/routes.js

@@ -13,6 +13,7 @@ router
     .group(() => {
     router.get('/', [MediaController, 'index']);
     router.post('/upload', [UploadController, 'store']);
+    router.delete('/media/:filename', [MediaController, 'destroy']);
     router.get('/logout', [AuthController, 'logout']);
 })
     .use(middleware.auth());