I have a basic Azure app service, with Tomcat 9.0. I want to deploy some pure web content directly to the folder /site/wwwroot/webapps/ROOT on the app service, using the Azure App Service Plugin in a Jenkins pipeline.

But whatever I specify as the targetDirectory attribute to the azureWebAppPublish-command in my Jenkinsfile, the content of my .zip-file ends up in the folder /site/wwwroot/. 

Is my understanding of the plugin wrong here, or how can I acheive my goal? My plugin command is like this:

azureWebAppPublish 
  azureCredentialsId: "myPrincipal", 
  resourceGroup: "my-resource-group", 
  appName: "my-app-service-name", 
  targetDirectory: "ignored?", 
  filePath: "my-files.zip"