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Implement a wildcard sub-domain just like the one on Vercel, Netlify, WordPress, Tumblr, and many others
I’m not sure if this is the right place to ask this, but
I am talking about when you create a new blog with Tumblr, you can create your domain *.tumblr.com, or when creating a deployment on Vercel or Netlify, you can have *.vercel.app or *.netlify.app
I get the gist that it’s maybe using a wildcard sub-domain, and some API since the user can create it through the app, but how do you build or what tools do you use to build something like that?
Or if you can point me out to where I can learn how to build something like that, I would be very grateful.
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