本篇文章主要是介绍了API的网关模式的特性，文章是来自微软官方博客并加入了自己的一点理解。译文来自：https://blogs.msdn.microsoft.com/cesardelatorre/2018/05/15/designing-and-implementing-api-gateways-with-ocelot-in-a-microservices-and-container-based-architecture/
参考资料：
API Gateway
https://docs.microsoft.com/en-us/azure/architecture/microservices/gateway
Aggregation and composition pattern