Here are the steps I followed to self-host my projects using Webstudio using this reference guide.
webstudio
webstudio link
webstudio build --template vanilla
npm run build
npm install --save-dev @remix-run/serve
PORT=3110 npx remix-serve build/server/index.js
sudo ln -s /etc/nginx/sites-available/tas.notion.lol.conf /etc/nginx/sites-enabled/
VITE_PORT=3110 npm run dev