Maybe it'd be better if you root the phone first, but I'd be hesitant to set up something like this on a system that is administrated remotely by others. Google

Maybe it'd be better if you root the phone first, but I'd be hesitant to set up something like this on a system that is administrated remotely by others. Google, the phone manufacturer, and your carrier can make changes to your device at any time without your consent or without any notice to you. Even without a sim card, this could enable them to access/delete/modify your files, add new files, or make changes that break your server or introduce vulnerabilities. There might be some way to make this safer, but it just seems like a bad idea to set up servers on devices that you don't control and which multiple third parties have privileged access to.