I’m not too familiar with synology, but I know it’s more locked down then just running on a Linux os like Ubuntu or debian.
I use the SWAG docker container, which sets up nginx and some other tools like ssl and fail2ban. I’m running it on Ubuntu.
The thread I linked in the last post contains a comprehensive setup guide. Pretty sure you can run docker containers on synology, but it might be a little different from the guide. Guide is in the top post (linked below)