Modify .env.example with placeholder values

Updated example environment variables for configuration.

Author: secus217

.env.example

@@ -18,18 +18,17 @@ API_KEY_PREFIX=ce_api_
 KUBERNETES_NAMESPACE=container-engine
 
 # Domain Configuration
-DOMAIN_SUFFIX=container-engine.app
+DOMAIN_SUFFIX=your_domain_suffix
 
 # Email Configuration - Mailtrap Live SMTP
-MAILTRAP_SMTP_HOST=live.smtp.mailtrap.io
+MAILTRAP_SMTP_HOST=your_host
 MAILTRAP_SMTP_PORT=587
-MAILTRAP_USERNAME=your_mailtrap_username
+MAILTRAP_USERNAME=your_mailtrap_usernamehost
 MAILTRAP_PASSWORD=your_mailtrap_password
-EMAIL_FROM=noreply@yourdomain.com
-EMAIL_FROM_NAME=Container Engine
+EMAIL_FROM=noreply@yourdomain.comapp
+EMAIL_FROM_NAME=your_app
+
 
-# Webhook Configuration
-WEBHOOK_URL=https://your-webhook-endpoint.com/api/webhook/container-engine/events?api_key=your_api_key
 
 # Logging
 RUST_LOG=container_engine=debug,tower_http=debug