When adding one of the Docker-based starter templates (from/starter-templates) while using an external Docker daemon that does not match the Docker provider's default value (/var/run/docker.sock), you will be met by an error message telling you that the Docker socket can't be reached.

This also means that the template won't be added to your instance due to the error, and you can't just change that, so you need to clone and edit the example from the repo, and then push it to your Coder instance.

I think we can fix this pretty easily by just adding avariable block asking for the socket's path.

cc:@matifali