Add additional step to Push to private repo

The private repo is needed to run the docker security scan

Jenkinsfile

@@ -67,6 +67,11 @@ node('docker') {
           def baseImg = docker.build("$maintainer/$imagename")
           baseImg.push("$tag")
     }
+    // Push to private repo to do security scan on container
+    docker.withRegistry('https://registry.hub.docker.com/',   "dockerhub-$maintainer") {
+          def baseImg = docker.build("$maintainer/security-scan-$imagename")
+          baseImg.push("$tag")
+    }
 
   stage 'Notify'