Split the monolithic init-caddy.sh into four ordered, idempotent
setup scripts for the Caddy deployment environment:
- install-base-deps: install required apt packages
- install-aws-cli: bootstrap AWS CLI v2
- install-caddy: fetch binary, create caddy:caddy, register systemd unit
- prepare-caddy-cicd: create bot deploy user + SSH, hand over web root
with ACLs, write site Caddyfile and start the service
- Make the web root overridable via WEB_ROOT (default /var/www)
zihluwang