Hi Michael, as I wrote in my first post I strictly followed the instructions and configured NextCloud with the IP of my machine:
I also saw the references to localhost in the CODE error log but I couldn’t figure out the reason. Finally, from within the CODE container I can ping both the host (192.168.1.122) and the NextCloud container (172.170.2), and a curl get to http://192.168.1.122:80 returns an error page from NextCloud saying that this site needs Javascript to be enabled, so yes I can contact NextCloud from CODE over http.
Thank you.