You might be thinking of one of these with “hot” or similar:
The proxy intercepts web requests, rewrites URLs, headers, and scripts on the fly, and serves the requested content to the user under the guise of an entirely different, unblocked domain name. Why AlloyProxy is "Hot" Right Now alloyproxy hot
The platform will automatically install dependencies and launch a web preview. Use that preview URL to browse freely. 2. Self-Hosting via Node.js You might be thinking of one of these