Update README.md

Author: mesadhan

README.md

@@ -27,6 +27,10 @@ Before post configuration read `data-vagrant/sample-jenkins-app/Jenkinsfile` pro
 
 Note: If you want to change `myMaven` and `myDocker` then makes sure `Jenkinsfile` also has the same label.
 
+4. Now setup Docker Hub credential Go -> `Global credentials' -> `Manage Jenkins` ID=`dockerHubAccount`, and put username, and password
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 ## 4. Create new job using `Multibrach Pipeline`, following
 
     1.From `General` -> `Branch Sources`
@@ -54,4 +58,4 @@ Please read `data-vagrant/sample-jenkins-app/Jenkinsfile` file properly.
 - http://localhost:18090
 
 ## SonarQube Setup
-If you like to enable sonarqube server then `data-vagrant/jenkins-devops-server/docker-compose.yml` uncomment and check it.
+If you like to enable sonarqube server then `data-vagrant/jenkins-devops-server/docker-compose.yml` uncomment and check it.