pipeline {
    agent any

    stages {
        stage('Build Docker Image') {
            steps {
                sh 'docker build -t localhost:5000/demo-app:${BUILD_NUMBER} .'
            }
        }

        stage('Push Image to Registry') {
            steps {
                sh 'docker push localhost:5000/demo-app:${BUILD_NUMBER}'
            }
        }
    }
}