I've been playing with Dokploy for a while and I noticed it provides a temporary domain for any apps you install, using the traefik.me service.

The traefik.me service is just a wildcard DNS server which simply responds back with whatever you put in the URL. For example: if you use the URL mysite-187-76-32-18.traefik.me, the DNS query will return the IP address 187.76.32.18. There is no API to use, traefik.me will simply mirror back whatever you throw at it.

So my suggestion would be to Ploi implement this feature, it is simple to use and understand. I have just tested this with one Wordpress website and it worked just fine. The URL structure is simple:

The only problem I had was that Let's Encrypt won't allow issuing SSL certificates, but that is simply because the traefik.me domain gets too many SSL requests.

Traefik.me is based off of sslip.io, which also operates this same service on their domain. They also provide sources or binaries for this wildcard DNS server so you can run one yourself under your own domain.