Develop a Serverless TypeScript API on AWS ECS with Fargate
AWS Fargate is a serverless compute engine that allows you to run containers without managing servers. With Fargate, you no longer have to provision clusters of virtual machines to run ECS containers: this is all done for you.
Fargate has an Amazon ECS construct that can host an API. In this take, we will build a Fargate service using the AWS CDK, put the API in a docker image, and then host it inside Amazon ECS.
Fargate has some benefits over lambda functions because of provisioned servers. When you have a high volume of traffic, you can save on costs by running containers. These can scale out to as many servers as needed to meet the current demand and avoid paying per request. Once you have millions of requests per day or even per hour, paying per actual load starts to become more cost-effective.
The one gotcha here is that scaling out can become a bit of a hassle because, by the time you spin up a new container, it is already too late to handle the current load. A good technique is to come up with scaling strategies ahead of time, which means you definitely must have a predictable load.
