add jenkinsfile

Jenkinsfile

@@ -0,0 +1,16 @@
+pipeline {
+  agent any
+  stages {
+    stage('Build image') {
+      steps {
+        withDockerRegistry([ credentialsId: "6ff44976-23cd-4cc2-902c-de8c340e65e5", url: "https://reg.zknt.org" ]) {
+          echo 'Starting to build docker image'
+          script {
+            def customImage = docker.build("reg.zknt.org/zknt/alpine:3.8.1")
+            customImage.push()
+          }
+        }
+      }
+    }
+  }
+}