Hi everybody !
I just updated my COPS from 1.3.6 to 3.3.1 on my Synology. Rather than overwriting the files in the directory, I extracted the files into a second directory and redid my configuration in config/local.php.
No problem on my side, I just had to remember to set write permissions on the thumbnail cache folder.
I use COPS directly through Synology Web Station, without Docker. I added script parameters for PHP 8.2 and then simply switched the portal from folder 1 (old version) to folder 2 (new version). No reverse proxy settings to modify.
For the moment this configuration suits me fine, but I'm considering migrating to a container on a ProxMox server in the future, so I'll let you know.
This will be an opportunity to update my tutorial, which dates back to the old version maintained by Seb Lucas.