Integrate html website inside webflow

Design help General
1

Hello everyone,
I am building a website in webflow for a studio and it was asked me to integrate into the website the old website in a kind of secret way like:
www.studiosite.com/old

The old website is built in HTML CSS and updated via FileZilla.

How do I manage this?

2

you have to use a reverse proxy or 2 domains and an iframe