The Caddy webserver which I and others have advocated as a reverse proxy has now been released as version 2RC, replacing version 1.   It is still possible to get version 1, but the page for building it with any plugins you may need has been hidden somewhat obscurely, and will not be maintained for much longer.  You can get it here: https://caddyserver.com/v1/download   Version 2 is a complete rewrite, and the instructions for setting up version 1 are not applicable in any way to version 2.