Caddyfile

# 32bit
DOWNLOAD_URL='https://caddyserver.com/download/linux/386?plugins=tls.dns.cloudflare&license=personal&telemetry=off'
# 64bit
DOWNLOAD_URL='https://caddyserver.com/download/linux/amd64?plugins=tls.dns.cloudflare&license=personal&telemetry=off'

rm -f /usr/local/bin/caddy
curl "$DOWNLOAD_URL" | tar -zxf - -C /usr/local/bin caddy
setcap cap_net_bind_service=+ep /usr/local/bin/caddy

Reference

• https://github.com/caddyserver/caddy/tree/891446d0/dist/init