Instead, the compose plugin must be installed.
We deprecate docker-compose because v1 is not supported starting from
the end of June 2023.
See "evolution of compose": https://docs.docker.com/compose/compose-v2/
Among other changes: ORA2 file uploads were stored in a folder named
"SET-ME-PLEASE (ex. bucket-name)" (sigh). With this change, the folder
should be automatically renamed to "openedxuploads". This issue has been
occuring since June 2019... (sigh²)
Close #707