Lisflood container cannot access rclone drive (Docker)

When using Docker, and mounting dcache using rclone, the lisflood notebook is unable to run. The error upon container setup is

> error while creating mount source path mkdir ... file exists

However, when the parameter set, forcing and maskmap files are copied to a local drive things go fine and the model runs.

It seems that this might have something to do with the certificate on the container, see [here](https://forum.rclone.org/t/accessing-google-drive-from-docker-container/24910).

Any ideas, @sverhoeven ?

Start by reproducing the Docker setup with dcache mounted through rclone, then compare it with the working case where parameter set, forcing, and maskmap files are copied locally. Investigate the reported mount-source error and the container certificate possibility, using the linked rclone forum discussion as context. Done means the LISFLOOD notebook runs with the mounted drive.

Written by the indexing model from the issue text.