Update case3.md

docs/en_US/case/case3.md

@@ -6,8 +6,28 @@ GitHub project: [nezha_telegram_bot](https://github.com/tech-fever/nezha_telegra
 
 
 ## Features
-Open source Telegram bot project that can query the server information of the Nezha Monitoring in real time based on the API.  
 
-- [x] Support Chinese/English multi-language switch  
+- [x] Support Chinese/English multi-language switch
-- [x] Support tag statistics (CPU, disk, memory, upstream and downstream speed, data transfer statistics, etc.)  
+- [x] Support tag statistics (CPU, disk, memory, upstream and downstream speed, traffic statistics, etc.)
 - [x] Support real-time refresh of single server data
+- [x] Support keyboard interactive query
+- [x] Support query by command
+- [x] Support adding bot to group, privacy protection of bot replies in group chat
+- [x] Support bot messages automatic deletion in group chat within 20 seconds
+- [x] Support docker deployment
+
+## Commands list
+
+Command | Description | Private chat only
+--- | --- | ---
+start | Getting started with the keyboard main menu | ✔️
+help | help message | ❌
+add | Add Nezha monitoring url link and token | ✔️
+url | Add Nezha monitoring url link | ✔️
+token | Add Nezha monitoring token | ✔️
+info | Get saved Nezha monitoring url link and token | ✔️
+delete | Delete saved Nezha monitoring url link and token | ✔️
+id | Add an integer id after the command to query the information of a single server (refresh button only available in private chat) | ❌
+all | Query statistics for all servers | ❌
+search | Search for keywords in server names (multiple keywords supported, split by spaces) | ❌
+