Add Reference to login_logout README

README.md

@@ -29,7 +29,8 @@ Notice that you need to create users and applications before being able to login
 You can use the scripts located in `user-panel/utils` to create users for testing.
 
 If you don't have a test application yourself, you can use the small OpeinID Connect
-test application located at `test/login_logout/`
+test application located at `test/login_logout/`. Instructions on how to run the test
+application can be found in `test/login_logout/README.md`.
 
 Also refer to `.gitlab-ci.yml` to get an idea on how to run all of the tests that are
 contained in this repository.