Update Jenkinsfile

Jenkinsfile

@@ -12,7 +12,7 @@ pipeline {
                 // Stop running microblog container
                 sh 'docker stop $(docker ps -q --filter ancestor=microblog:latest) || true && docker rm $(docker ps -q --filter ancestor=microblog:latest) || true'
                 // Prune old containers that are not running
-                sh 'docker container prune'
+                sh 'echo y | docker container prune'
                 // Deploy new container
                 sh 'docker run --name microblog -d -p 5000:5000 --rm microblog:latest'
             }