How do I use volume?

Hi, Pardon me for being a noob in Docker. I wanted to deploy this image from https://hub.docker.com/r/getsentry/relay I read the documentation (https://github.com/fullstorydev/relay-core/blob/master/docs/running.md) and it seems that it requires a single configuration file named relay.yaml has to be created first in /etc/relay/ folder. The Dockerfile of the image contains this line: VOLUME ["/work", "/etc/relay"] Which I asssumed to be a command to mount /work folder in the volume to /etc/relayfolder in the Docker container. This means that I just need to create a volume containing a single relay.yamlfile which will then be mounted to a /work folder in that container. To create that file, here's what I did: I created the file manually via Filebrowser template (https://github.com/brody192/filebrowser-template/pkgs/container/filebrowser-template). I placed the file in the root folder because it will be mounted to the container anyway. Afterwards I detached that volume and mounted it to the Docker container. However, it seems that the application still thinks that the config file that I created manually is not there, as if the volume is not mounted at all (2nd screenshot) My questions are: 1. Did I do it correctly? 2. Am I correct to assume that Railway volume would be used/mounted to the container via VOLUMEcommand in the Dockerfile? Sorry if my question is not really clear. I am really new to Docker. Thank you very much!