The current starter template is based on Remix 0.20.1.
The deploy button will guide you through the setup for CF_API_TOKEN and CF_ACCOUNT_ID on the UI. But you are still required to provide the REMIX_TOKEN as a repository secret yourself for the deploy action to work properly.
To starts your app in development mode, rebuilding assets on file changes, the recommended approach is:
npm run dev
This will run your remix app in dev mode using miniflare with the Cypress test runner opened.
First, preview your app with:
npx wrangler preview
When confirmed everythings works, deploy the worker with Wrangler using:
npm run deploy