This repo is just experimenting internal architecture of node and how node is backed by C++. How v8 engine and libUv plays important role in the node application. Experimenting with small express() App - by blocking event loop, utilizing concepts of threads, multi-threads and how node actual handles super low level operations and also enhancing performance of the node by using cluster mode (trying concurrency request)....
Nowadays developers don't write clustering scripts as mentioned in the repo (as it's just experimental and educational purpose) instead there are some cool tools to handle such as PM2