My understanding from the HTML Template days is that a monolith contained both the business and presentation layer together. I made plenty of those with Struts

My understanding from the HTML Template days is that a monolith contained both the business and presentation layer together. I made plenty of those with Struts 1.x and Spring MVC. Micro services were pitch as a means to separate the front end and back end. I'm a bit confused on microservices vs monolith in the modern SPA context. If I have an application that's front end is React and back end is Go and the two communicate over REST/HTTP+RPC, do I have microservices or a monolith?