This is a Hackernews clone site built with next.js implementing GraphQL APIs, for which Apollo Client is adopted in the frontend and Apollo Server in the backend server. We can successfully build a full functionality of GraphQL server with next.js, including queries, mutations, and subscriptions. The real-time communication of subscriptions however was found not to function well once the package is deployed to Vercel, which is a serverless platform. Therefore real-time Firebase Cloud Firestore is used to substitute GraphQL subscriptions.