Webhooks

If you read the Cloudflare Tunnel post, you know the problem: localhost does not accept webhooks, OAuth providers reject http://localhost as a redirect URI, and showing a client work-in-progress means a deploy. Cloudflare Tunnel is a solid solution, but it requires a Cloudflare account and domain setup.

Every developer hits the same wall eventually. You are building a webhook integration, testing an OAuth flow that demands a public redirect URI, or trying to show a client a work-in-progress without deploying it. Your app is running fine on localhost:5000, but the outside world cannot reach it.