sorry newbie question. i was going thru the pulumi.awsworkshop.io process, every thing works fine however if for some reason, i come out of cloud 9 and go back in all work previously executed (index.ts, respective aws enviroment setups etc., subdirectory create is gone. even though the cloud9 instance and role are still valid etc. this is frustrating, should i be saving the configuration in pulumi prior to exiting cloud 9 ?