301 redirects from Medium blog posts to Webflow

I want to move my company’s blog from subdomain on Medium (blog.company.com) to our main domain on Webflow (company.com/blog). I’ve already set up all the blog posts in Webflow but can’t figure out how to add 301 redirects for my Medium posts?

Under Project > Settings > Hosting > 301 redirects in Webflow it seems that I can only add redirects from old path to new path within my main domain. When I add my Medium post URL to old path, it tells me that “Path must start with “/””

How do I add 301 redirects in this case?