Comment by whydoineedthis

If you want to host your own version of this in AWS, automated with terraform, you can use https://github.com/nelsonenzo/tolocal

It uses basic auth at the edge to protect the endpoint being used by anyone. The technical advantage to self hosting is bandwidth throughput. For instance, If your using a css framework that is bulky on dev, but then minimized for prod, you will often find the ngrok/cloudflare tunnels too slow to load the local host assets.