API Gateway + Keycloak

i have 5 Microservices (Java Spring) a Keycloak Server and a RabbitMQ Server all deployed via Docker. I want to start using a API Gateway to have the same baseadress for all MS:

demo.com/api/ms1/
demo.com/api/ms2/
...

But im a bit overwhelmed. What would you guys recommend? What is the easiest most begginer friendly solution to use?

thanks