Update Configuration.md

Configuration.md

@@ -13,7 +13,7 @@ This is the main DES configuration that contains basic configuration variables t
 
 ### Parameters ###
 
-
+```
 [System]
 **RDS_ID** DES identifier (ex. DES_$ID@yourdomain.org)
 **RDS_HOME** HOME directory of DES 
@@ -42,6 +42,8 @@ This is the main DES configuration that contains basic configuration variables t
 **SMTP_PORT** Port for SMTP 
 [Plugin] 
 **CONFIG_PLUGIN** Configuration for Plugins. Java variable: DistributionServerConfig.CONFIG_PLUGIN
+```
+
 
 ### Sample configuration