The "./run.sh" will create and map the container's data and workspace directories to the host's directory as below (unless you change ./.env configuration).
You can copy source data or projects/workflow to these two directory and the Gephi Studio inside the container will have direct access to the files you just copy.
$HOME/data-docker/gephi-docker-x11
├── data
└── workspace
└── Example Workflows
And, "docker-compose" will use the current git project directory's "./workspace" to map the container's /home/developer/workspace:
./workspace
Note: You can copy your Gephi workflow project in and out the workspaces and it is directly mapped into the container's /home/developer/workspace.
You might see the warning message in the launching xterm console like below, you can just ignore it. I googles around and some blogs just suggested to ignore since the IDE still functional ok.