Serve your site under a path with nginx or Caddy

location = /blog      { include snippets/notra-site.conf; }
location /blog/       { include snippets/notra-site.conf; }
location = /changelog { include snippets/notra-site.conf; }
location /changelog/  { include snippets/notra-site.conf; }

proxy_pass https://acme.notra.site;
proxy_set_header Host acme.notra.site;
proxy_ssl_server_name on;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Cookie "";
proxy_set_header Authorization "";

www.acme.com {
	@notra path /blog /blog/* /changelog /changelog/*
	handle @notra {
		reverse_proxy https://acme.notra.site {
			header_up Host {upstream_hostport}
			header_up -Cookie
			header_up -Authorization
		}
	}

	handle {
		# The rest of your website.
		reverse_proxy localhost:3000
	}
}