Hey,
At Wasmer we are working on making any traditional app serverless-like.
Basically, we can freeze and restore workloads (work in progress, not yet released publicly) very easily thanks to WebAssembly and the Wasmer runtime. Because of that, the boot time is almost non-existing.
Let me know if you would like to trial it further and I can guide through the process: https://wasmer.io/products/edge
My email: syrus@wasmer.io