add Jenkinsfile for CI loop test

Jenkinsfile

@@ -0,0 +1,12 @@
+pipeline {
+  agent any
+  stages {
+    stage('hello') {
+      steps {
+        sh 'echo hello from tavros ci'
+        sh 'hostname'
+        sh 'date'
+      }
+    }
+  }
+}