Add Jenkins pipeline for Docker build and deployment

Jenkinsfile

@@ -0,0 +1,63 @@
+pipeline {
+    agent any
+
+    environment {
+        DOCKERHUB = credentials('dockerhub')            // Jenkins stored credential ID
+        IMAGE = "ankith222/webapp"                      // Your Docker Hub repo
+    }
+
+    stages {
+        stage('Checkout Code') {
+            steps {
+                git branch: "${env.BRANCH_NAME}", url: 'https://github.com/ankith2235/website.git'
+            }
+        }
+
+        stage('Build Docker Image') {
+            steps {
+                sh "docker build -t ${IMAGE}:${env.BRANCH_NAME} ."
+            }
+        }
+
+        stage('Test') {
+            steps {
+                echo "Simulated tests passed successfully!"
+            }
+        }
+
+        stage('Push Docker Image') {
+            when {
+                anyOf { branch 'master'; branch 'develop' }
+            }
+            steps {
+                sh """
+                echo ${DOCKERHUB_PSW} | docker login -u ${DOCKERHUB_USR} --password-stdin
+                docker push ${IMAGE}:${env.BRANCH_NAME}
+                """
+            }
+        }
+
+        stage('Deploy to Workers') {
+            when {
+                branch 'master'
+            }
+            steps {
+                echo "Deploying application to worker nodes..."
+                sh """
+                ssh ubuntu@172.31.21.245 'docker stop webapp || true && docker rm webapp || true && docker run -d -p 80:80 --name webapp ${IMAGE}:${env.BRANCH_NAME}'
+                ssh ubuntu@172.31.26.42 'docker stop webapp || true && docker rm webapp || true && docker run -d -p 80:80 --name webapp ${IMAGE}:${env.BRANCH_NAME}'
+                ssh ubuntu@172.31.23.244 'docker stop webapp || true && docker rm webapp || true && docker run -d -p 80:80 --name webapp ${IMAGE}:${env.BRANCH_NAME}'
+                """
+            }
+        }
+    }
+
+    post {
+        success {
+            echo "Build and Deployment Completed Successfully!"
+        }
+        failure {
+            echo "Build or Deployment FAILED — Check logs!"
+        }
+    }
+}