[1.13] Server-side proxy for images
This release adds a proxy route (accessible at /image-proxy?url=URL) that caches remote images in memory for 10 minutes, with a maximum image size of 524 KB
It also modifies two default renderers — vanilla and blackfriday — so that image nodes are now rendered with /image-proxy?url=%s prepended, enabling automatic use of the new proxy service. To disable this behavior, you must modify the Convert functions within your preferred rendering engine.
This feature was added to provide an additional layer of security for users, as it was previously possible to use third-party image hosting to track users' IPs
Full Changelog: 1.12...1.13