[doc] update readme

README.md

@@ -1,21 +1,31 @@
 # A simple RPC demo
 
-Remote Procedure Call (RPC)
+A simple RPC demo implemented in Go and Rust.
 
+The server is already hosted on `test.lingkang.dev:8333` for testing.
+
+The rustdoc of client side is hosted on [`lingkang.dev/rpc_demo/`](https://lingkang.dev/rpc_demo/client/index.html).
+
+See this blog post for more details: [Implement RPC demo from scratch - Lingkang's Blog](https://lingkang.dev/2024/01/08/rpc/).
+
+## Table of Contents
+
+- [Table of Contents](#table-of-contents)
 - [1. Server](#1-server)
   - [1.1. Run](#11-run)
   - [1.2. Output](#12-output)
 - [2. Client](#2-client)
   - [2.1. Run](#21-run)
   - [2.2. Output](#22-output)
+- [3. CLOC](#3-cloc)
 
 ## 1. Server
 
 The server side is implemented in Go, under the `./server` directory.
 
 ### 1.1. Run
 
-The server is already hosted on `test.lingkang.dev:8333`, but you can also run it locally:
+To run it locally:
 
 ``` bash
 cd server
@@ -27,10 +37,16 @@ Or build and run the binary:
 ``` bash
 cd server
 go build -o target/rpc_demo cmd/main.go
-nohup ./target/rpc_demo &
+./target/rpc_demo
 ```
 
-Use `nohup ./server/target/rpc_demo >/dev/null 2>&1 &` to discard the output.
+Or use `nohup` to run it in the background.
+
+``` bash
+nohup ./target/rpc_demo > ./target/output.txt 2>&1 & # keep the output
+# or
+nohup ./target/rpc_demo > /dev/null 2>&1 & # discard the output
+```
 
 ### 1.2. Output
 
@@ -58,3 +74,24 @@ cargo run
 A naive implementation of logger based on `log` crate is used in this demo:
 
 ![The running output of the client side](./img/client_running.png)
+
+---
+
+## 3. CLOC
+
+Count lines of code:
+
+``` txt
+-------------------------------------------------------------------------------
+Language                     files          blank        comment           code
+-------------------------------------------------------------------------------
+Go                               5             60             50            347
+Rust                             8             84            120            320
+Markdown                         2             51              0            119
+YAML                             2             13              2             45
+PowerShell                       1              7              0              8
+TOML                             1              2              1              7
+-------------------------------------------------------------------------------
+SUM:                            19            217            173            846
+-------------------------------------------------------------------------------
+```