Caddyfile

{
    admin off
    log {
        output file /data/caddy.log
        format console
        level debug
    }
}

:3001 {
    @api {
        path /api/*
    }
    handle @api {
        uri strip_prefix /api
        reverse_proxy localhost:3000
    }

    @api_root {
        path /api
    }
    handle @api_root {
        rewrite * /api/
        reverse_proxy localhost:3000
    }
}