make it explicit we're using thin server
make it explicit we're using thin server

cyber-dojo/runner_stateless,cyber-dojo/runner,cyber-dojo/runner,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless,cyber-dojo/runner_stateless