docs: document discord commands

README.md

@@ -1,5 +1,13 @@
 # V Rising Discord Bot
 
-This bot allows you to display some information about your v rising server on Discord.
+This bot allows you to display some information about your v rising server on discord.
 
 ![Preview](./docs/preview.png)
+
+## Commands
+
+| Command                                             | Description                               |
+|-----------------------------------------------------|-------------------------------------------|
+| `/add-server <server-hostname> <server-query-port>` | Adds a server to the status monitor.      |
+| `/list-servers`                                     | Lists all server status monitors.         |
+| `/remove-server <server-status-monitor-id>`         | Removes a server from the status monitor. |