try to push to private nuget feed

Jenkinsfile

@@ -10,5 +10,22 @@ done'''
       }
     }
 
+    stage('Pack') {
+      steps {
+        sh 'rm **/*.nupkg'
+        sh '''for i in **/MLEM*.csproj; do
+    dotnet pack $i --version-suffix ${BUILD_NUMBER}
+done'''
+      }
+    }
+
+    stage('Publish') {
+      steps {
+        sh '''for i in **/*.nupkg; do
+    nuget push $i -s https://nuget.ellpeck.de/v3/index.json
+done'''
+      }
+    }
+
   }
 }