Hi @bkodd, currently Expo projects are all served from the Expo server. Letting people self-host is something we’ve thought about several times – while it would require work on Expo, we’ve made decisions along the way that would keep open the possibility of self-hosting.
I posted a more detailed explanation of our services, including the reliability of security of them, here. You might find it interesting to read: A little post about the reliability, security, and performance of Expo services