Add tests for endpoints

pkg/registrar/endpoints.go

@@ -0,0 +1,12 @@
+package registrar
+
+import (
+	"net/http"
+)
+
+func HandleRegister(resp http.ResponseWriter, req *http.Request) {
+	headers := resp.Header()
+	headers.Set("content-type", "application/json")
+	resp.WriteHeader(http.StatusOK)
+	resp.Write([]byte(`{"status": "registered"}`))
+}