In the past few days I have been struggling trying to install Nextcloud on my home server (actually, a Raspberry Pi4 with 4 GB RAM running Raspberry Pi Os based on Debian 11 Bullseye).
I finally managed to install a functional and relatively quick instance it using docker-compose with the 3 files that you can find at my GitHub repository.
While this is still a work-in-progress i.e., more explanations have to be written and more comments are needed in the files, I hope that someone may take advantage of it until it’s finished.
Have fun!