Sail is Docker, right? Docker is local. So your app should be accessible on localhost, as long as your network in Docker is set to bridge, or anything non-blocking.
Edit your /etc/hosts file, find the line with 127.0.0.1 and add your applications domain name if you aren't accessing it through localhost:some-port.
If you're on Windows (why on earth would you be?) the file is found in Windows\System32\drivers IIRC...it's been a while.