How to provide a subdomain for every customer with forwarding? You experience with that?

Hope this helps you:
https://serversforhackers.com/c/nginx-multi-tenancy
https://serversforhackers.com/c/server-setup-for-multi-tenancy-applications

With Laravel is pretty easy (but not trivial) ohdearapp published how they do it:
https://ohdear.app/blog/how-we-used-caddy-and-laravels-subdomain-routing-to-serve-our-status-pages

Can even setup to allow totally custom domains.

If you are using nGinx, then check out:

https://dabase.com/e/04055/

This will give you some help

if you manage your own stuff, you can do an http fwd with common http servers like nginx and apache just by config.
you also don't have to do fwding

lookup url rewrite for example

I was the original person who asked this question. After some search I came accross https://www.rebrandly.com/. It seems to have the features we were looking for. Not signed up yet though.

Just posting here in case it is useful for others.

Had the same Problem a few days ago! Caddyserver is the solution you're looking for

You can do something like this:

1. Create a DNS record to route all requests with subdomains to a specific web server.
2. From the request, read the subdomain that was used to reach the web server
3. Trigger redirect (or any other logic) based on that value