The document discusses moving from a monolithic .NET application hosted on Azure App Services to a microservices architecture using containers and Kubernetes on Azure Container Service. It outlines some pros and cons of the monolithic approach versus microservices, including improved scalability, testability and deployability with microservices. It then shows the new architecture with React.js frontends, Node.js microservices running in containers orchestrated by Kubernetes on ACS, with VSTS for continuous integration and delivery.