update Jenkinsfile2

Jenkinsfile_stats

@@ -0,0 +1,22 @@
+pipeline {
+    agent {
+	docker {
+		image 'docker_image'
+	}
+	}
+    parameters{
+        buildSelector(
+            defaultSelector: lastSuccessful(),
+            name: 'BUILD_SELECTOR',
+            description: 'Which build to use for copying artifacts'
+        )
+    }
+    stages {
+        stage("Script") {
+            steps {
+                sh "./lab2/stats.sh"
+                archiveArtifacts 'stats.txt'
+            }
+        }
+    }
+}