Hi I am missing "docker tag ${imageTag} ${imageTag} " otherwise I get "denied: requested access to the resource is denied" when trying to docker push

.gitignore

@@ -0,0 +1 @@
+*.DS_Store

Jenkinsfile-4

@@ -1,25 +1,25 @@
 def timeInMillis = currentBuild.timeInMillis
-def imageTag = "darinpope/alpine:" + timeInMillis
+def imageTag = "ugurkocak1980/alpine" + timeInMillis
 @Library("shared-library") _
 pipeline {
   agent any
   environment {
-    DH_CREDS=credentials('dh-creds')
+    UK_CREDS=credentials('uk-creds')
   }
   stages {
     stage('Hello') {
       steps {
         sh """
           echo "FROM alpine:latest" > Dockerfile
-          docker build -t ${imageTag} .
+          docker build -t ${imageTag} . 
         """
         sh '''
-          echo $DH_CREDS_PSW | docker login --username=$DH_CREDS_USR --password-stdin
-        '''
+        echo $UK_CREDS_PSW | docker login --username=$UK_CREDS_USR --password-stdin
+        '''        
         script {
           def sha256 = sh(returnStdout: true, script:"docker push ${imageTag} | grep sha256 | awk -F':' '{print \$4}' | awk '{print \$1}'").trim()
           echo sha256
-          def url = "https://hub.docker.com/layers/" + env.DH_CREDS_USR + "/alpine/" + timeInMillis + "/images/sha256-" + sha256 + "?context=explore"
+          def url = "https://hub.docker.com/layers/" + env.UK_CREDS_USR + "/alpine" + timeInMillis + "/latest/images/sha256-" + sha256 + "?context=explore"
           addSidebarLink(url:url,text:"Image on Docker Hub",icon:"star.gif")
         }
       }
@@ -30,4 +30,4 @@ pipeline {
       }
     }
   }
-}
+}