Preview for site while customizing

[mehdibha]

Hello guys,
I am building a site builder (https://notionfol.io) and used vercel platforms as a starter.
I changed the architecture to become /[domain]/[template], see image below

So my question is anyone have an idea how can i make a preview for the site while customizing it in /app.

My thoughts:
I wanted to make a scalable solution as i can i have 100 templates in the future and re exporting all the components and rendering them in preview will not be a good solution as i will loose the folder based routing and will have to handle that by myself, i also thought about making an iframe (and maybe pass the json for template as query params or smthng like that)

Illustration (i want to make a preview in the right side)

Any thoughts? thanks 😳

[mehdibha]

Okey, found the solution for those who are interested:
iframe + draft mode