Hi Guy, thank you for your input.
I’m now back at my home.
Firstly, I will try to build zynthian step by step on the nanopi m4v2 itself (wich is much more powerfull than the nanoPiK1plus, with its Nvme HD and 4 Go ram), starting from the armbian server image and using the script
setup_system_rbpi_raspbian_lite_buster.sh
Then, if I’am successfull with this (<=> having an armbian adapted setup_system script), I’ll go further in automation (as I’m pretty new with these docker/jenkins stuff).