Astro middleware is a great place to add logging. You might want to track how long requests take, which regions you get most traffic from, or even which days or what time of day visitors are most active on the site. You can do all of that by adding logging, using a serverless log provider like Logtail. Logtail has a REST API, and it is quick to code up debug, info and error logs, for consumption in the Logtail console or further downstream.