So, the developer says they’re in the hospital this week, according to GitHub issues. The domain has been renewed though, and is now back up: https://cusdis.com/
In terms of self-hosting to Railway: it’s not too hard, and I’m not super techie either (inversely: setting up an FTP account sounds complicated to me :lol:).
Here is a guide by Railway: https://blog.railway.app/p/cusdis
There’s also this video on doing Vercel + Railway, which is what I did way back when: https://www.youtube.com/watch?v=XHr0oBIA2xA
However, Railway implemented their own full deployment, so it’s a loooot easier now. I’d suggest just following Railway’s guide.
Once it’s deployed, go to your Dashboard, click on the app, click on the rounded rectangle, and under “Deployments”, you should find the app’s domain link (it’ll be something like “app-name.railway.app”). You can edit the service domain under “Settings”.
Go to that service domain, login with the credentials you set, and set up Cusdis as you would with the hosted version.