Registering a resteasy service in a Quarkus extension - quarkus

Question

I am currently attempting to write my first Quarkus extension, which needs to deploy a rest service. For that purpose I have been looking at the Quarkus tutorial for creating extensions here, and it is pretty close to what I need to do. The problem is that it shows a Servlet, and I would very much like to deploy a RestEasy(Jackson) service instead.
I have created an extension project and added the following service in the runtime module
package my.test.quarkus.extension;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
#Path("/mytest")
public class TestEndpoint {
private static Logger LOGGER = LoggerFactory.getLogger(TestEndpoint.class);
#POST
#Path("/service")
public void testService(){
LOGGER.info("Logit!");
}
}
But the service is not being picked up it seems, as my test returns 404.
package my.test.quarkus.extension.test;
import io.quarkus.test.QuarkusUnitTest;
import io.restassured.RestAssured;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.RegisterExtension;
public class ExtensionTest {
#RegisterExtension
static final QuarkusUnitTest config = new QuarkusUnitTest()
.withEmptyApplication();
#Test
public void testGreeting() {
RestAssured.when().post("/mytest/service").then().statusCode(200);
}
}
I assume i need a BuildItem registering the service inside the deployment project of my extension, but my question is, which BuildItem do i use? Looking at the list of BuildItems there are loads of them, and even filtering those out that has nothing to do with RestEasy, still leaves over 50, most of them without JavaDoc.
If someone can help me with the problem at hand, simply registering a RestEasy service, as well as an interceptor, from an extension, that would be appreciated. And you will get bonus gratitude if you can explain exactly how to navigate through the Quarkus BuildItems when building extensions, because to me it just seems like a jungle of code, but I am guessing I am missing something.