add jenkinsfile

Jenkinsfile

@@ -0,0 +1,34 @@
+pipeline {
+    agent any
+    stages {
+        stage('Checkstyle') {
+            steps {
+                sh 'mvn checkstyle:checkstyle'
+            }
+            post {
+                always {
+                    archiveArtifacts artifacts: '**/target/checkstyle-result.xml', allowEmptyArchive: true
+                }
+            }
+        }
+        stage('Test') {
+            steps {
+                sh 'mvn test'
+            }
+        }
+        stage('Build Without Tests') {
+            steps {
+                sh 'mvn clean package -DskipTests'
+            }
+        }
+        stage('Create Docker Image and Push') {
+            steps {
+                script {
+                    def commitId = sh(script: 'git rev-parse --short HEAD', returnStdout: true).trim()
+                    sh "docker build -t your-docker-hub-username/spring-petclinic:${commitId} ."
+                    sh "docker push your-docker-hub-username/spring-petclinic:${commitId}"
+                }
+            }
+        }
+    }
+}