diff --git a/Jenkinsfile b/Jenkinsfile
index 5c2f5ff..366bb29 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -3,8 +3,9 @@ pipeline {
 
     environment {
         DOCKER_IMAGE = 'homework-backend'
-        DOCKER_TAG = "${env.BUILD_NUMBER}"
-        DOCKER_REGISTRY = '192.168.50.221:45000'  // Replace with your Docker registry
+        IMAGE_TAG = "${env.BUILD_NUMBER ?: 'latest'}"
+        DOCKER_REGISTRY = "192.168.50.221:45000" // replace with your registry e.g. docker.io/yourorg
+        DOCKER_CREDENTIALS_ID = "dockerhub-credentials" // set this credential in Jenkins
     }
 
     stages {