add docker and jenkins files

Dockerfile

+FROM openjdk:17-jdk
+
+WORKDIR /app
+
+COPY jar/notificationsvc-0.0.1-SNAPSHOT.jar /app/notificationsvc-0.0.1-SNAPSHOT.jar
+
+CMD ["java", "-jar", "notificationsvc-0.0.1-SNAPSHOT.jar"]
\ No newline at end of file

Jenkinsfile

+pipeline {
+
+    agent {
+        label 'localhost_Agent'
+    }
+    tools {
+        jdk 'Java17'
+        maven 'Maven3'
+    }
+    environment {
+        APP_NAME = "jobseekersvc"
+        RELEASE = "1.0.0"
+        DOCKER_REGISTRY_URL = "http://172.29.3.41:5000"
+        IMAGE_NAME = "172.29.3.41:5000/${APP_NAME}:${RELEASE}.${BUILD_NUMBER}"
+    }
+    stages {
+        stage('Cleanup Workspace') {
+            steps {
+                cleanWs()
+            }
+        }
+        stage('Checkout from SCM') {
+            steps {
+                git branch: 'master', credentialsId: 'gitLab', url: 'https://git.hiast.edu.sy/abdullh.alsoleman/notificationsvc.git'
+            }
+        }
+        stage("Build & Push Docker Image") {
+            steps {
+                script {
+                    def dockerImage = docker.build("${IMAGE_NAME}")
+                    dockerImage.push()
+                }
+            }
+        }
+    }
+}