Jenkins parameterized

Jenkinsfile.declarative

@@ -1,8 +1,6 @@
 pipeline {
   environment {
     imageObject = ''
-    imageName = 'jenkins/sos-milter'
-    dockerRegistry = 'https://dockreg-fra.zwackl.de'
   }
 
   agent any
@@ -14,7 +12,7 @@ pipeline {
         /* This builds the actual image; synonymous to
          * docker build on the command line */
         script {
-          imageObject = docker.build(imageName)
+          imageObject = docker.build(${env.imageName})
         }
       }
     }
@@ -34,9 +32,9 @@ pipeline {
     stage('Push image') {
       steps {
         script {
-/*          docker.withRegistry(dockerRegistry) {*/
+          docker.withRegistry(${env.dockerRegistry}) {
             imageObject.push()
-/*          }*/
+          }
         }
       }
     }