switch jenkins to BlueOcean builds and add healthcheck and Jenkinsfile.

not sure we can actually complete a pipeline deployment successfully, because of restart

dockerfiles/services/jenkins/Jenkinsfile

@@ -0,0 +1,32 @@
+node('docker') {
+    def app_name = 'jenkins'
+    def app_port = '8080'
+    def workdir = 'dockerfiles/services/jenkins'
+
+    stage('prepare') {
+        git credentialsId: 'f1f58215-c789-44a2-9b72-50e4425cb061', url: 'ssh://git@git.xai-corp.net:10022/xai-corp.net/provisioning.git'
+        sh 'ls'
+    }
+
+    stage('build') {
+        dir(workdir) {
+            sh "DOCKER_HOST=dkhost:2376 docker-compose -f docker-compose.yml pull"
+        }
+    }
+
+    stage('deploy') {
+        dir(workdir) {
+            sh """
+                docker stack deploy -c docker-compose.yml jenkins
+                docker service update jenkins_app
+            """
+        }
+    }
+
+    stage('smoke tests') {
+        dir(workdir) {
+            sleep 60
+            sh "curl -If http://dkhost:8080/metrics/ejkxeVI-iKLy968ji9AnfYmOHGIh1kYd3gA500JqrRxzTeenT06ynR5Dqo0CQplO/healthcheck"
+        }
+    }
+}