Run on singularity / without logging into container

[Shellfishgene]

Hi!
I would like to try ORP on our cluster, but we only have singularity available. I converted the Docker image, and it works to some extent. However using singularity shell orp.sif does not work quite like docker: I have both file systems available and it wants to load conda envs from the host, also $HOME points to the host /home. How would I start this in Singularity so it acts the same as in Docker? singularity exec orp.sif bash has the same problem.

And also to run it on the cluster I would have to start ORP non interactively from a shell script, how would that look?