Robots.txt only works after you’ve NoIndexed existing image URLs. Otherwise Googlebot will never be able to reach those URLs in the first place.
If there’s no direct/simple way to achieve this, another way of addressing my concern would be – how to ensure Publii doesn’t generate dedicated pages/URLs for Images? This has been a major issue with Yoast SEO on WordPress sites in the past.
Yes, this is normal behavior; images must be located somewhere, and if you want to display them on a web page linked from that location.
To remove the full src path, you can try to use Relative URLs in server settings, but I’m not sure if it helps.
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