Docker Volume Permissions

I’ve struggled recently with outputing results in a docker container. The files get root permissions and gitlab fails to clean up. I found this little trick to give the files the user if of the current user.

-u `id -u` 

e.g

docker run --rm -u `id -u` -v  `pwd`/data/:/var/data:z -w="/var/app" --net=host dockerimage:5  commandToRun

anything saved to the /va/data folder inside folder will get the owner of whoever ran it. The group stays as root.