Added Dockerfile to containarized the application

Jenkinsfile

@@ -0,0 +1,52 @@
+pipeline{
+    agent any
+    tools {
+      maven 'Maven'
+    }
+    environment {
+		DOCKERHUB_CREDENTIALS=credentials('docker-jenkins-connect')
+        DOCKERUSER="banina"
+	}
+    stages{
+        stage('Maven Build'){
+            steps{
+                sh "mvn clean package"
+            } 
+        }
+		stage('Docker Build Petclinic') {
+
+			steps {
+				sh 'docker build -t $DOCKERUSER/spring-petclinic:${BUILD_NUMBER}-dev .'
+			}
+		}
+		stage('Login to Docker HUB') {
+
+			steps {
+				sh 'echo $DOCKERHUB_CREDENTIALS_PSW | docker login -u $DOCKERHUB_CREDENTIALS_USR --password-stdin'
+			}
+		}
+
+		stage('Push') {
+
+			steps {
+				sh 'docker push  $DOCKERUSER/spring-petclinic:${BUILD_NUMBER}-dev'
+			}
+		}
+        stage('Cleanup') {
+            steps{
+                sh "docker rmi $DOCKERUSER/spring-petclinic:${BUILD_NUMBER}-dev"
+            }
+        }
+        stage('CleanWorkSpace'){
+            steps {
+                cleanWs()
+            }
+        }
+	}
+	post {
+		always {
+			sh 'docker logout'
+		}
+	}
+
+}

dockerfile

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+FROM openjdk:11
+COPY target/*.jar /spring-petclinic.jar
+CMD ["java", ""-jar" , "spring-petclinic.jar"]