ADD Dockerfile reference is not validating HTTP status code in buildah und subsequentially in OpenShift Container Platform 4

Issue

• During a OpenShift build we are executing a step like shown below with the ADD reference. If the webserver replies with a 404 error, the error is writen to the app.jar instead forcing the build to fail.

  STEP 8/12: ADD https://webserver.example.com/app.jar /deploy/app.jar
  time="2022-06-23T15:01:58Z" level=warning msg="Adding metacopy option, configured globally"
  --> fdbeb7ba0bf
  

• buildah does not respect the HTTP status code returned when using ADD Dockerfile reference. Instead a file with the name is added with the HTTP response code included, showing the 404 error.