Nextcloud on Odroid XU4

Hi, My NAS based on an Odroid XU4 and nextcloud + mariadb crashed. I had copies of my stack used in portainer and tried to regenerate my system on that way. Unfortunately I get the error message that portainer can not find a mariadb image for the arm/v7 32bit on which the Odroid XU4 is based. It looks like I must use older versions of the mariadb image and probably also for nextcloud to have them matching. Could you pleas help me to have the right information to enter in my stack installing docker container for nextcloud and mariadb. Best would if I could get a stack template. Thank you for your kind help and best regards - Roger Zink -