Site is accessing external resources for images,

While dealing with #382 (closed) I've found out there are request being made directly to third party sites which should be avoided. Wherever is possible images.hive.blog should be used as a proxy. That's a regression for #44 (closed) at least.

I cannot reproduce it shortly after, so I'm guessing that there might be some conditional fallback mechanisms in place, but that's something that we discussed to be eventually handled by imagehoster itself, as otherwise it could be abused in order to trick a client to load unproxied content, and even then it should be rather image unavaiable placeholder, anyway, that's out of scope of denser.