Hide webflow branding on masked URL

Hi All/Webflow team,

I have pro webflow account and already build a simple landing page (let say the URL is : https://harked.webflow.io/landing).

I have another website which is https://harked-site.com hosted on AWS and I’ve setup nginx web server there.

I wanna mask URL https://harked.webflow.io/landing with https://harked-site.com/landing.

So if user go to https://harked-site.com/landing, the browser load the content from https://harked.webflow.io/landing. It already works well so far.

I use below code on my nginx:

location ^~ /landing {
               proxy_pass https://harked.webflow.io/landing;
}

My only question is : I’ve already hide the webflow branding on https://harked.webflow.io/landing, but when user go to https://harked-site.com/landing, it still show the webflow branding on the bottom right corner.

do you have any advice on this (how to remove webflow branding from a masked site)?

Regards,
Harked.