OP#496 update Readme

Jenkinsfile

@@ -87,7 +87,7 @@ stage('build and push image to gitlab') {
                     sh '''
                         git checkout master
                         git pull origin master
-                        git rm -f Jenkinsfile || echo "no Jenkinsfile to remove from git"
+                        git rm -f Jenkinsfile
                         git rm -r --cached .vscode || echo "No .vscode to remove from git"
                         git remote add master https://sourcecode.confdroid.com/confdroid/confdroid_pgbouncer.git
                         git -c credential.helper="!f() { echo username=${GITEA_USER}; echo password=${GITEA_TOKEN}; }; f" \