Define alert in installation.mdx of eternalcombat docs part.

Author: vLuckyyy

content/docs/eternalcombat/installation.mdx

@@ -3,6 +3,8 @@ title: Installation Guide
 description: Learn how to install and configure EternalCombat on your Minecraft server
 ---
 
+import { AlertBox } from "../../../components/ui/alert-box";
+
 ## 📋 Prerequisites
 
 Before installing EternalCombat, ensure you have:
@@ -86,6 +88,6 @@ After installation, EternalCombat will create the following files:
    - Reduce update frequencies
    - Monitor server performance
 
-<Alert type="info">
+<AlertBox type="info">
  Need help? Join our <a href="https://discord.gg/FQ7jmGBd6c">Discord server</a> or check our <a href="https://github.com/EternalCodeTeam/EternalCombat/issues">GitHub issues</a>.
-</Alert>
+</AlertBox>