doc(README): add tech features

Author: marjune163

README.md

@@ -3,7 +3,7 @@ Simple command line based HTTP file server to share local file system.
 
 ![Go HTTP File Server pages](doc/ghfs.gif)
 
-## Features
+## Usage Features
 - More friendly UI than Apache/Nginx directory index page
 - Adapt for mobile display
 - Single executable file
@@ -12,6 +12,11 @@ Simple command line based HTTP file server to share local file system.
 - Can specify a custom theme for page rendering
 - Support location alias(mount another directory to url location)
 
+# Tech Features
+- Monolithic architecture
+- Stateless
+- Zero third party dependency
+
 ## Compile
 Minimal required Go version is 1.18.
 ```sh

README.zh-CN.md

@@ -12,6 +12,11 @@
 - 可以指定自定义主题来渲染页面
 - 支持目录别名（将另一个目录挂载到某个URL路径）
 
+# 技术特色
+- 单体架构
+- 无状态
+- 零第三方依赖
+
 ## 编译
 至少需要Go 1.18版本。
 ```sh