Can not run gwsetup

[jarama]

When trying to run this container on my Synology NAS I can access the Geneweb portal after installation (via port 2317), but not the setup (via port 2316). When looking at the logs I see the following on the first line:

"/usr/local/bin/main.sh: line 30: /usr/local/var/geneweb/gwsetup_only.txt: Permission denied"

I installed it using:
"sudo docker run --name geneweb -e HOST_IP={LANIP_FROM_MY_NAS} --restart=always -p 2316:2316 -p 2317:2317 -v /volume1/docker/geneweb:/usr/local/var/geneweb -d jeffernz/geneweb"

I also tried running it with elevated permission, but to no avail.