We have installed the Bitnami ResourceSpace Stack on an ionos.de cloud server, CentOS 7, in May 2018 and this was easy enough without any experience in server administration. There is nothing else than RS on that server. A few issues with resourcespace have cropped up lately and I guess, it would be best to upgrade to the current version first.
I've found detailed instructions on how to upgrade resourcespace itself here on bitnami. But: Isn't there anything else, that needs upgrading? I am prepared to invest time, but I don't know what I need to look for.