I'm working on a blogging infrastructure and I'm sort of practicing how things are going to work with the domains. I have figured how to make users have their own subdomain and fetch their blog based on that. Now, I'm trying to figure out how users can have their own custom domain. I have the domain something.com which serves the "blogs" and users can have subdomains like username.something.com I'm trying to map a custom domain name which is the DNS is managed by Vercel to map customdomain.io to username.something.com The CNAME record for customdomain.io looks like www CNAME username.something.com but it doesn't work.
I tried using the ALIAS method too, it doesn't work.
