Added Jenkinsfile

Jenkinsfile

@@ -0,0 +1,23 @@
+pipeline {
+  agent any
+  stages {
+    stage('Build') {
+      steps {
+        dotnetBuild(configuration: 'Release')
+      }
+    }
+
+    stage('Test') {
+      steps {
+        dotnetTest(configuration: 'Release')
+      }
+    }
+
+    stage('Push Package') {
+      steps {
+        dotnetNuGetPush(apiKeyId: '3yAJPMxcaEhb_HP62dxK', source: 'http://nuget.l--n.de/nuget/l--n/v3/index.json')
+      }
+    }
+
+  }
+}