move nextcloud image from nextcloud:fpm-alpine to nextcloud:production-fpm-alpine
I noticed that fpm-alpine image has already moved to Nextcloud 16 and it is breaking a lot of applications (not yet ready). I think the usage of production-fpm-alpine is more conservative and should be used instead.
WARNING: if somebody already migrate to new image of fpm-alpine, this change will probably break his/her installation (by reverting back to Nextcloud 15)
Edited by doc75