Yes, see also faq:servermove [DokuWiki]
On NS8 the files are in the Dokuwiki container in /bitnami/dokuwiki.
I recommend to copy the dokuwiki data from the dokuwiki user environment so you don’t need to care about permissions:
Enter the dokuwiki environment (in this example “dokuwiki1” is used, please replace it with the instance name of your dokuwiki installation):
runagent -m dokuwiki1
To upload the untarred dokuwiki folder to the container:
podman cp dokuwiki dokuwiki:/bitnami/
Another way is to copy files and folders under dokuwiki as root to /home/dokuwiki1/.local/share/containers/storage/volumes/dokuwiki-data/_data/ and set right owner/permissions afterwards.
Alternatively you could move the pages (not media) by using the Advanced plugin that provides an import/export utility.
EDIT:
I didn’t test the migration, maybe there’s an issue regarding the configuration files but saving the DokuWiki app settings in the cluster-admin should hopefully reconfigure everything and make it work again.