We will install a Rust binary in the postinstall step and will programatically run the binary. Thus as it is Rust binary, it will eliminate need of docker.
It was not possible before as Prisma 1.0 was written in Scala which requires JVM and it is very hard to package it as a binary. Prisma 1.0 was also born out of GraphCool so this two server architecture was there for some legacy reasons as well.
We still value Prisma Server as a powerful tool for enterprise use cases and it will be back soon for that.