Custom Domain for CDN

Hey Andrea, welcome to the forum!

We do have clients that have set up their custom cdn on top of Prismic, but we don't recommend doing this because, if not regularly and properly implemented/maintained, it will affect the response time, loading time and induce maintenance cost of your end.

Also, by doing this, specifically with Images, you lose the possibility to access the Image optimization feature.

We always prefer to recommend that users focus on their core business and let Prismic take care of the hosting and distribution/Caching of your content.