Revert "Add Caddyfile"

This reverts commit 8eb210482b.

It's documented here:

https://git.b12f.io/pub-solar/infra/src/branch/main/www/caddy/Caddyfile

Caddyfile

@@ -1,39 +0,0 @@
-# Caddy's configuration file
-# see: https://caddyserver.com/docs/caddyfile
-{
-        email admins@pub.solar
-}
-
-pub.solar {
-        # Uncomment for debugging
-        #log {
-        #       output stderr
-        #}
-
-        # PubSolarOS images
-        handle /os/download/* {
-                root * /srv
-                file_server /os/download/* browse
-        }
-
-        # serve base domain pub.solar for mastodon.pub.solar
-        # https://masto.host/mastodon-usernames-different-from-the-domain-used-for-installation/
-        handle /.well-known/host-meta {
-                redir https://mastodon.pub.solar{uri}
-        }
-
-        # pub.solar website
-        handle {
-                root * /srv/pub.solar
-                try_files {path}.html {path}
-                file_server
-        }
-
-        handle_errors {
-                respond "{http.error.status_code} {http.error.status_text}"
-        }
-}
-
-www.pub.solar {
-        redir https://pub.solar{uri}
-}