Add Jenkinsfile for Jenkins pipeline

Jenkinsfile

@@ -0,0 +1,47 @@
+pipeline {
+  agent any
+  tools { nodejs 'Node18' }
+  environment {
+    WEB_IP = '13.49.223.142'     // your EC2 web server IP
+    SSH_CRED = 'deploy-ec2-key'  // Jenkins credential ID for SSH key
+  }
+  stages {
+    stage('Checkout') { steps { checkout scm } }
+    stage('Install')  { steps { sh 'npm ci || npm install' } }
+    stage('Build')    { steps { sh 'npm run build' } }
+    stage('Package') {
+      steps {
+        sh '''
+          OUT_DIR="build"
+          [ -d dist ] && OUT_DIR="dist"
+          if [ ! -d "$OUT_DIR" ]; then
+            echo "ERROR: No build output found (build/ or dist/)"
+            ls -la
+            exit 1
+          fi
+          tar -czf build.tar.gz -C "$OUT_DIR" .
+        '''
+        archiveArtifacts artifacts: 'build.tar.gz'
+      }
+    }
+    stage('Deploy') {
+      steps {
+        sshagent(credentials: [env.SSH_CRED]) {
+          sh '''
+            scp -o StrictHostKeyChecking=no build.tar.gz deploy@${WEB_IP}:/tmp/build.tar.gz
+            ssh -o StrictHostKeyChecking=no deploy@${WEB_IP} '
+              sudo rm -rf /var/www/reactapp/*;
+              sudo mkdir -p /var/www/reactapp;
+              sudo tar -xzf /tmp/build.tar.gz -C /var/www/reactapp;
+              sudo systemctl reload nginx
+            '
+          '''
+        }
+      }
+    }
+  }
+  post {
+    success { echo "✅ Deployed successfully" }
+    failure { echo "❌ Failed — check console" }
+  }
+}