Added Helm packaging step for Jenkins pipeline

Jenkinsfile

@@ -77,6 +77,11 @@ spec:
                     sh 'docker push docker.local/bme/covidok:latest'
                 }
             }
+            container('helm'){
+                stage('Package Helm') {
+                    sh 'helm package /home/jenkins/agent/workspace/gitea-bme_covidok-backend_master/helm/covidok'
+                }
+            }
             stage('Archive chart'){
                 archiveArtifacts artifacts: '/home/jenkins/agent/workspace/gitea-bme_covidok-backend_master/covidok*tgz', followSymlinks: false, onlyIfSuccessful: true
             }