We should move the docs from source code folder to document folder

[qizhou]

System information

EthStorage node version: es-node version
Build date: e.g. Tue 12 Dec 2023 04:20:27 AM EST
System version: e.g. amd64/linux
Golang version: e.g. go1.20
Commit hash : (if develop)

Expected behaviour

Actual behaviour

Steps to reproduce the behaviour

Backtrace

[backtrace]

When submitting logs: please submit them as text and not screenshots.