added jenkinsfile

added fix

Jenkinsfile

@@ -0,0 +1,27 @@
+pipeline {
+    agent any
+    triggers { pollSCM('* * * * *')}
+    stages {
+        stage('VCS'){
+            steps {
+                git url: 'https://github.com/dumyrepositories/spring-petclinic-multibranch.git',
+                    branch: 'main'
+            }
+        }
+
+        stage('Build'){
+            steps {
+                sh 'mvn package'
+            }
+        }
+
+        stage('Post Build') {
+            steps {
+                archiveArtifacts artifacts: '**/target/*.jar',
+                                 onlyIfSuccessful: true
+                junit testResults: '**/surefire-reports/TEST-*.xml',
+                      allowEmptyResults: false
+            }
+        }
+    }
+}