By default, the REPL will fetch the most recent version of Svelte from https://unpkg.com/svelte. If you need to test a local version of Svelte, you can do so by linking it and navigating to [localhost:3000/repl?version=local](http://localhost:3000/repl?version=local):
In order for the REPL's GitHub integration to work properly when running locally, you will need to create a GitHub OAuth app. Set its authorization callback URL to `http://localhost:3000/auth/callback`, and in this project, create `site/.env` containing: