Duck tape is perfectly correct, it was the original name given to the tape with it only being used for duct work much later on.
From The Wikipedia article:
“Duck tape” is recorded in the Oxford English Dictionary as having been in use since 1899[2] and “duct tape” (described as “perhaps an alteration of earlier duck tape”) since 1965.[3]
It was originally used for making shoes stronger and was later used for sealing ammo tins.
I use the community maintained docker container from https://github.com/nextcloud/docker
It’s separate containers for all the services, if you scroll down the readme you’ll find the compose file they recommend to start you out.