Update Jenkinsfile: separate backend and frontend deployment with dynamic ports

Jenkinsfile

@@ -1,5 +1,131 @@
-        stage('Deploy') {
+pipeline {
+    // 1. Run all heavy lifting (builds) on the dedicated Agent
+    agent { label 'jenkins-agent' }
+
+    environment {
+        // --- REGISTRY & REPOSITORY FIXES ---
+        REGISTRY_URL = 'registry.digitalocean.com/devsecops-lab'
+        REPO_NAME = 'core' // Single repository for Free Tier
+        
+        // --- TAGS ---
+        BACKEND_TAG = "backend-${env.BRANCH_NAME}-${env.BUILD_NUMBER}"
+        FRONTEND_TAG = "frontend-${env.BRANCH_NAME}-${env.BUILD_NUMBER}"
+        
+        // --- DEPLOYMENT TARGET ---
+        DEPLOY_HOST = 'gitea.kongseng.in' 
+        DEPLOY_USER = 'root'
+    }
+    
+    stages {
+        stage('Checkout') {
+            steps { checkout scm }
+        }
+        
+        stage('Install Dependencies') {
+            steps {
+                echo "Installing dependencies for ${env.BRANCH_NAME} branch..."
+                // Assuming Node is installed on the agent
+                dir('backend') { sh 'npm install' }
+                dir('frontend') { sh 'npm install' }
+            }
+        }
+        
+        stage('Build Docker Images') {
             steps {
                 script {
-                    // Define Ports for Dev environment
+                    echo "Building Backend & Frontend Images..."
-                    def backendPort = "3001"
+                    sh "docker build -t ${REGISTRY_URL}/${REPO_NAME}:${BACKEND_TAG} ./backend"
+                    sh "docker build -t ${REGISTRY_URL}/${REPO_NAME}:${FRONTEND_TAG} ./frontend"
+                }
+            }
+        }
+
+        stage('Push to Registry') {
+            steps {
+                withCredentials([string(credentialsId: 'do-registry-token', variable: 'DO_TOKEN')]) {
+                    script {
+                        echo "Logging into DigitalOcean Registry..."
+                        
+                        // Clean login for robustness
+                        sh 'rm -f ~/.docker/config.json'
+                        sh 'echo $DO_TOKEN | docker login registry.digitalocean.com -u token --password-stdin'
+                        
+                        echo "Pushing images..."
+                        sh "docker push ${REGISTRY_URL}/${REPO_NAME}:${BACKEND_TAG}"
+                        sh "docker push ${REGISTRY_URL}/${REPO_NAME}:${FRONTEND_TAG}"
+                        
+                        sh 'docker logout registry.digitalocean.com'
+                    }
+                }
+            }
+        }
+        
+        stage('Remote Deploy') {
+            steps {
+                script {
+                    echo "--- REMOTE DEPLOYMENT STARTED ---"
+                    
+                    // 1. Define Dynamic Ports and Names
+                    def backPort = "3000"
+                    def frontPort = "4000"
+                    
+                    if (env.BRANCH_NAME == 'Dev') { backPort = "3001"; frontPort = "4001"; } 
+                    else if (env.BRANCH_NAME == 'Release') { backPort = "3002"; frontPort = "4002"; } 
+                    else if (env.BRANCH_NAME == 'main') { backPort = "3003"; frontPort = "4003"; }
+
+                    def backName = "backend-${env.BRANCH_NAME}"
+                    def frontName = "frontend-${env.BRANCH_NAME}"
+
+                    // 2. Define SSH Command using the specific deploy key
+                    def remote = "ssh -o StrictHostKeyChecking=no -i ~/.ssh/id_rsa_deploy ${DEPLOY_USER}@${DEPLOY_HOST}"
+
+                    // 3. Authenticate and Deploy BOTH Containers
+                    withCredentials([string(credentialsId: 'do-registry-token', variable: 'DO_TOKEN')]) {
+                        
+                        // Remote Login (Gitea Server needs to pull)
+                        sh "${remote} 'echo ${DO_TOKEN} | docker login registry.digitalocean.com -u token --password-stdin'"
+                        
+                        // --- BACKEND DEPLOYMENT (Primary Service) ---
+                        echo "Deploying Backend to Port ${backPort}..."
+                        sh "${remote} 'docker pull ${REGISTRY_URL}/${REPO_NAME}:${BACKEND_TAG}'"
+                        sh "${remote} 'docker stop ${backName} || true'"
+                        sh "${remote} 'docker rm ${backName} || true'"
+                        sh """
+                            ${remote} 'docker run -d \
+                            --name ${backName} \
+                            --restart always \
+                            -p ${backPort}:3000 \
+                            ${REGISTRY_URL}/${REPO_NAME}:${BACKEND_TAG}'
+                        """
+                        
+                        // --- FRONTEND DEPLOYMENT (Secondary Service) ---
+                        echo "Deploying Frontend to Port ${frontPort}..."
+                        sh "${remote} 'docker pull ${REGISTRY_URL}/${REPO_NAME}:${FRONTEND_TAG}'"
+                        sh "${remote} 'docker stop ${frontName} || true'"
+                        sh "${remote} 'docker rm ${frontName} || true'"
+                        sh """
+                            ${remote} 'docker run -d \
+                            --name ${frontName} \
+                            --restart always \
+                            -p ${frontPort}:3000 \
+                            ${REGISTRY_URL}/${REPO_NAME}:${FRONTEND_TAG}'
+                        """
+
+                        sh 'docker logout registry.digitalocean.com'
+                        
+                        echo "Deployment Complete! Backend: http://${DEPLOY_HOST}:${backPort}, Frontend: http://${DEPLOY_HOST}:${frontPort}"
+                    }
+                }
+            }
+        }
+    }
+    
+    post {
+        always {
+            // Cleanup: Delete source code and clean Docker cache on the Agent
+            echo 'Cleaning Agent workspace...'
+            deleteDir()
+            sh 'docker system prune -f'
+        }
+    }
+}