Pull image from ghcr.io and have it works with Synology Docker

readme.md

Enable SSH on Synology DSM

Control Panel => Terminal & SNMP => Terminal => Check "Enable SSH service"
Keep port 22, we will disable SSH at the end for security reason so no need to have some exotic config here

Open a Terminal and SSH onto the Synology

ssh <user>@<synology-ip>
The password is the one you use to log into your NAS (I do hope you have a password!)

Once logged in

sudo -i
This will makes you root, so be careful not typing anything stupid :)

Pull the image your want :
docker pull ghcr.io/<your-wanted-image>

Now if you go to the WEB UI of your Synology, the image should appear in Synology Docker :)

_{Source :
https://www.reddit.com/r/chia/comments/n8brgr/how_to_get_the_official_chia_docker_image_to/}