Merge pull request #4 from yusukebe/add-status-code-for-error

add status code `400` for error response

src/index.tsx

@@ -14,7 +14,7 @@ app.get('/', async (c) => {
   });
 
   if (error) {
-    return c.json(error);
+    return c.json(error, 400);
   }
 
   return c.json(data);