But that misses the point. This is very helpful for understanding how a Docker-like system works since it's a small and mostly self-contained implementation. You can read through the entire thing and fully understand it.

It only cheats in the container registry handling where it pulls in github.com/google/go-containerregistry and for the network setup where it uses github.com/vishvananda/netlink. The rest is done in terms of Go stdlib and syscalls.

Early Docker used external utilities (lxc, iptables) and had the client/server stuff already so it's not as straightforward.

> What Programming Language Does Docker Use? Docker is written in the Google Go (golang) programming language. To learn why Go was used, we’ll refer you directly to Google.[1]

[1] https://blog.stoneriverelearning.com/docker-101-what-is-dock...