Created by: mwubloop
I'm a user of Play framework(Scala) and React, and I usually start react app with PlayRunHook that executes react-scripts as a part of the run process.
By default scala does not provide stdin for Process. This start up process worked fine for me until this update. I spent some time to find the cause since in this case the development server is closed immediately without logging.
This PR adds a log when dev server is closed when stdin ends, I believe this can help debugging greatly for those who have similar start up issue as I have.