更新许可证，更新主页、调整了一些文章格式

docs/en_US/index.md

@@ -2,15 +2,16 @@
 home: true
 heroImage: https://raw.githubusercontent.com/naiba/nezha/master/resource/static/brand.svg
 heroText: Nezha Monitoring
-tagline: Self-hosted lightweight multi-server and website monitoring and alerting.
+tagline: A open source, lightweight server and website monitoring and O&M tool
 actionText: Learn more →
 actionLink: /en_US/guide/dashboard
 features:
-- title: 特性1
-  details: 特性1特性1特性1
-- title: 特性2
-  details: 特性2特性2特性2
-- title: 特性3
-  details: 特性3特性3特性3
-footer: Licence | Copyright © 2022-present Nezhahq
----  
+- title: One-Click Installation
+  details: Support use one-click script to install Dashboard and Agent services; Linux, WIndows, MacOS, OpenWRT and other mainstream systems are supported
+- title: Monitoring at any time
+  details: Support monitoring the system status of multiple servers at the same time, support monitoring the status of web pages, ports, SSL certificates; support notifications in case of failure, out of data and other status. Support multiple notification methods (Telegram, email, WeChat, etc.)
+- title: Lightweight O&M tool
+  details: Support WebSSH, support cyclic monitoring data, support setting scheduled tasks and running command on multiple servers
+footer: Copyright © 2022-present Nezhahq
+---  
+<br/>This work is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/">Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License</a>.