fix(docker): clean up exec output handling and remove app:list workaround#985

susnux merged 3 commits into

nextcloud-libraries:mainnextcloud-libraries/nextcloud-e2e-test-server:mainfrom

joshtrichards:jtr/fix-docker-stderr-handlingjoshtrichards/nextcloud-e2e-test-server:jtr/fix-docker-stderr-handlingCopy head branch name to clipboard