Similarly, I was recently itching to generate Github Pages-like static sites from my self-hosted Gitea instance to include a blog. I had set up a global webhook filtered for 'webdeploy' branch pushes that would send a request to a specific Caddy path whitelisted for Gitea. An exec function for Caddy would run a shell script (yeah, I know) that would clone/pull the repo into a known directory, create a proxied subdomain for it in Cloudflare, and push necessary changes to Caddy's config.

While I don't have the same hesitations about depending on a small chain of open-source projects, I really didn't like the idea of caddy-exec despite my basic precautions, so I abandoned this approach until I can ponder it a bit more.