*Note for those using GoDaddy, Namecheap, etc...
Redirecting with path is only possible with Cloudflare and Google Domains. It will not work with other domain registrars like GoDaddy, Namecheap, etc.
If you are using GoDaddy or Name Cheap or etc… you will need to transfer the domain over to Cloudflare, since the redirect option to forward the domain along with the path is not provided by GoDaddy.
Here are help articles which should help you with the transfer:
Transfer to Cloudflare: https://developers.cloudflare.com/registrar/domain-transfers/transfer-to-cloudflare
Transfer to Google Domains: https://support.google.com/domains/answer/9003139?hl=en
Google Domains:
To set up the redirect watch this video:
Cloudflare:
To set up the redirect watch this video: