Jenkinsfile small clean

Jenkinsfile

@@ -14,7 +14,9 @@ def build_docker(docker_image, docker_dir, release_dir) {
 	}
 	return "\n - ${image_name}"
 }
+
 properties([[$class: 'BuildDiscarderProperty', strategy: [$class: 'LogRotator', artifactDaysToKeepStr: '', artifactNumToKeepStr: '10', daysToKeepStr: '', numToKeepStr: '20']], copyArtifactPermission('*')]);
+
 node {
 	stage("Download SRC") {
 		checkout scm
@@ -40,7 +42,10 @@ node {
 		}
 	}
 
-	sh "docker system prune -f"
+    stage("Clean") {
+	    sh "docker system prune -f"
+	}
+
 	archiveArtifacts 'release/*'
 	echo "${_msg}"
 }