Add Jenkinsfile

Jenkinsfile

@@ -0,0 +1,17 @@
+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}'
+            }
+        }
+    }
+}