Setting up Spring Cloud Gateway

Setting up Spring Cloud Gateway as an edge server is straightforward and can be done with the following steps:

1. Create a Spring Boot project using Spring Initializr, as described in Chapter 3, Creating a Set of Cooperating Microservices – refer to the Using Spring Initializr to generate skeleton code section.
2. Add a dependency on spring-cloud-starter-gateway-server-webflux.
3. To be able to locate microservice instances through Netflix Eureka, also add the spring-cloud-starter-netflix-eureka-client dependency.
4. Add the edge server project to the common build file, settings.gradle:

   include ':spring-cloud:gateway'
   

5. Add a Dockerfile with the same content as for the microservices; see the Dockerfile content in the $BOOK_HOME/Chapter10/microservices folder.
6. Add the edge server to our three Docker Compose files:

   gateway:
     environment:
       - SPRING_PROFILES_ACTIVE=docker
     build: spring...