Since March 2024, services deployed from a template are attached directly to the template's GitHub repository, so you can't edit the source without first "ejecting." In your service settings under Source, you'll find an Upstream Repo setting with an Eject button that creates a copy of the repo in your own GitHub account, which you can then modify (e.g., bump the Typesense version) and it will automatically redeploy. This is essentially the same as your forking idea, but handled through our eject workflow so the service stays properly linked.