https://docs.spring.io/spring-cloud-gateway/reference/4.2-SNAPSHOT/spring-cloud-gateway-server-mvc/filters/preservehostheader.html
PreserveHostHeader Filter :: Spring Cloud Gateway
spring cloudfiltergateway
https://docs.spring.io/spring-cloud-gateway/reference/4.2-SNAPSHOT/spring-cloud-gateway/gatewayfilter-factories/preservehostheader-factory.html
PreserveHostHeader GatewayFilter Factory :: Spring Cloud Gateway
spring cloudfactorygateway