Add update hook

Jenkinsfile

@@ -1,5 +1,8 @@
 pipeline {
     agent any
+        environment {
+            WATCHTOWER_TOKEN = credentials("watchtower-token")
+        }
     stages {
             stage('Cloning our Git') {
                 steps {
@@ -33,6 +36,8 @@ pipeline {
                             dockerImage.push()
                         }
                     }
+
+                    sh 'curl -H "Authorization: Bearer $WATCHTOWER_TOKEN" http://172.16.0.104:9001/v1/update'
                 }
             }