APIGW Server • How to build RESTful API Server • How to build GraphQL Server • How to connect Other HTTP API • Content Server • How to build gRPC Server • How to connect MySQL • How to connect Redis • How to connect MongoDB • Event Log Server • How to connect Kafka • How to connect Elasticsearch • Content Sync Server • How to build WebSocket Server • Project Structure • Dependency Injection • Config Manage • Testing tools • Develop tools