I am new to Next 13 and I have tried to find a lot of resources online which just tells how to use next JS

I am unable to find any documentation on how internally NextJS is designed.

Can someone please point to some good resources through which I can understand the next JS internals

For example

I have questions like below

1. When building a web app, how does next js create chunks
2. When does the hash of the chunk gets updated ?