Blocking http crawlers

The pollux.casa server sometimes experiences load peaks due to AI training crawlers and search engines.

pollux.casa allows hosted Gemini capsules to be accessible through both https and gemini protocols. Of course, it's on the https side that the crawlers come into play.

Since the main reason for having a capsule on pollux.casa is to offer it on the smolnet gemini, I'm going to take the liberty of installing a crawler blocker on the https version.