Build Docs Update

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Please add this to build-docs: https://github.com/letheanVPN/documentation/tree/main/docs/chain

https://github.com/letheanVPN/blockchain/pull/220#issue-1111683583

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Do we have to create a folder name build-docs in this repository and add these contents from the repo?

I can make the base functionality to hello world level and link to the documentation pages to add reconfigurability.

Would that be helpful?