dockerfile and jenkinsfile has been added

Dockerfile

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+FROM openjdk:17-jdk-slim
+WORKDIR /app
+COPY target/*.jar app.jar
+EXPOSE 8080
+ENTRYPOINT ["java","-jar","app.jar"]

Jenkinsfile

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+pipeline {
+  agent any
+
+  stages {
+
+    stage('Checkout') {
+      steps {
+        git 'https://github.com/spring-projects/spring-petclinic.git'
+      }
+    }
+
+    stage('Build') {
+      steps {
+        sh 'mvn clean package -DskipTests'
+      }
+    }
+
+    stage('Test') {
+      steps {
+        sh 'mvn test'
+      }
+    }
+
+    stage('SonarQube Analysis') {
+      steps {
+        withSonarQubeEnv('sonarqube') {
+          sh 'mvn sonar:sonar'
+        }
+      }
+    }
+
+    stage('Docker Build') {
+      steps {
+        sh 'docker build -t petclinic:1.0 .'
+      }
+    }
+
+    stage('Run Application') {
+      steps {
+        sh '''
+          docker rm -f petclinic || true
+          docker run -d -p 8081:8080 --name petclinic petclinic:1.0
+        '''
+      }
+    }
+  }
+}