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For now, I’m not actually using it to post many of the images of the website, even though I could. However, I’m using it to store the webmentions author’s photos. They were being served directly by webmention.io but I think it’s better to serve them myself.
The media endpoint works well: it receives an object and stores it on BunnyCDN. However, I want to add some customization options such as resizings and compressions for images through query parameters, as well as some default ones so I don’t need to always specify them.
Or if you don't know what a response is, you can always write a webmention comment (you don't need to know what that is).