Reth book for user (#666)

* add reth book structur

* introduction to reth

* add system requirement

* update docs

* Add node detail

* add Disclaimer for disk estimate

* add Disclaimer for disk estimate

* add comman-line options

* matrics docs

* add logs docs

* remove disk usage for now

* Add disable-discovery flag in cli docs #597

Co-authored-by: Satoshi Okamoto <satoshi@butcher73.com>

book/SUMMARY.md

@@ -1,9 +1,16 @@
-[Introduction](./README.md)
+# Reth Book
 
-# Getting Started
+## Getting Started
+- [Introduction](./README.md)
+- [System requirements](./getting_started/system_requirement.md)
+- [Installation Reth](./getting_started/installation.md)
 
-- [Installation](./installation.md)
-- [First Steps with Reth]()
-<!-- An overview of all the flags, how they work and how to configure the node   -->
-- [Configuring The Node]()
-- [Running Reth]()
+## Fundamentals
+- [Node](./fundamentals/node.md)
+- [Command-Line Options](./fundamentals/command-line_options.md)
+- [Logs](./fundamentals/logs.md)
+
+## Monitoring
+- [Matrics](./monitoring/matrics.md)
+
+## [FAQ](./faq/README.md)