[POC] Implement a proxy endpoint for blog post cover images to not need to move them out of Notion

[guillermodlpa]

Proof of concept for changing image hosting strategy from using a script to move Notion assets to Cloudinary to adding a proxy endpoint for Notion images that can cache them indefinitely. Based on https://jake.tl/projects/notion-api#solving-image-hosting

Demo:

• Images in https://site-git-notion-resources-api-guillermodlpa.vercel.app/blog are loaded using a proxy endpoint, and then rendered with Next.js image optimization

To do:

• Make the proxy images statically generated on build time and revalidation, to not depend on Notion's state when the Vercel Edge Network cache expires (note SSR caching has a limit of 31 days in Vercel)

Alternatives:

• There might be nothing more stable and robust than moving the images to a separate service, like Cloudinary. That way, images are persistent and we don't depend on a cache that could be reset at any time to avoid requests to Notion after the pages are generated.

[vercel]

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