I’ve always found serverless platforms a little magical. You deploy a function, send a request, and somewhere in the world, resources are allocated automatically and your code gets executed. But the more I used these platforms, the more I wanted to understand what was actually happening underneath.So I built a lightweight serverless runtime from scratch using Firecracker microVMs.This is an honest account of what I learned — including the parts where I had no idea what I was doing.The full proje...