Docker and docker-compose should run on a dedicated user

[jmMeessen]

I am not sure of the user that Docker and Compose run with. I believe that they run under root (which is very bad practice)

I would be able to solve the segmentation issue I have with compose because the temp directory is not executable (witch I would like to keep that way)

The segmentation issue can be solved with export TMPDIR=/some_new_path_with_room (docker/compose#4137) before executing compose. Having a dedicated user would make it more easy to manage