Add Cloudflare custom domain to Vercel

1. Sign up and sign in to Cloudflare https://dash.cloudflare.com/sign-up.
2. In your Cloudflare dashboard, select the Domain Registration > Register Domains tab.
3. Search for your favorite domain and purchase it. In my case, I purchased the domain https://nivethan.me/ for my portfolio.
4. Sign in to Vercel and go to your dashboard, where you can see all your projects in the Overview tab.
5. Click on a project and on the top right, select Domains.
6. Type your domain in the text box, e.g., nivethan.me, and click Add.
7. Select the recommended option: Add www.nivethan.me and redirect nivethan.me to it.
8. Vercel will show an invalid configuration under your domains and display the relevant A record IP under nivethan.me and a CNAME IP under www.nivethan.me. These need to be set up on Cloudflare to make it work.