The proxy build repo exists for the sole purpose of providing precompiled Caddy2 binaries that have the forwardproxy plugin included by default. See the releases page.
Caddy2 has become an unofficial default for Cloud.gov applications needing an easy-to-use forwardproxy implementation. By default the Caddy2 binary does not have the required forwardproxy plugin needed to use the server as a forward proxy. This repo solves that problem by compiling Caddy using xcaddy with the forwardproxy plugin ready to go, reducing the effort required to quickly get the proxy in place.
See the example script
This project is in the worldwide public domain. As stated in CONTRIBUTING:
This project is in the public domain within the United States, and copyright and related rights in the work worldwide are waived through the CC0 1.0 Universal public domain dedication.
All contributions to this project will be released under the CC0 dedication. By submitting a pull request, you are agreeing to comply with this waiver of copyright interest.