Stable URL for all branches pointing to latest deployment of related branch

### What problem are you trying to solve?

I am trying to setup a test environment. While this should be a quite simple task for the production environment, it is currently not that simple for environments related to branches other than main as the url for the deployed service changes with every deployment.

### Describe the solution you'd like

It would be extremely helpful to have a stable url for all branches and let these urls automatically point to the latest deployment of each branch:

```-.deno.dev```

### Describe alternatives you've considered

manual update of the url after each deployment for all branches/enviroments != main/production

### Documentation, Adoption, Migration Strategy

_No response_