Is it possible to run the openproject docker image as a specific user? 

For instance, the files created through the mounted volume "data" are being created as user 1000 on my host system. I do not want to give user 1000 the ability to access all those files.

I tried adding

user: "1009:1009"

to the docker-compose.yml in the x-op-app section, but when I run that there's  a lot of access errors being thrown even though the mounted volume is owned by UID 1009. The service never gets up and running.