I don’t know about Matlab, but R is prepackaged for eg Ubuntu/Debian, and all the other distros, Python ditto, and downloading and extracting Julia is straightforward.
In any case, the suggestion was about creating a Docker image with Julia, which is fairly simple.
Either use the docker image as the default (root) user (it’s a sandbox, can’t do any harm), or create a user and install Julia as that user.
Creating a Docker image with a preinstalled & precompiled set of Julia packages is something that should be fairly easy for an IT department that otherwise uses Docker.