Anki Deck Images Not Showing

Bug Description

The following Anki decks contain images:

• System Design
• System Design Exercises

However, the images in these Anki decks aren't getting displayed.

Example

Detailed Investigation

Here's the img element for the "Domain name system" card:

<img src="https://camo.githubusercontent.com/fae27d1291ed38dd120595d692eacd2505cd3a9c/687474703a2f2f692e696d6775722e636f6d2f494f794c6a34692e6a7067" data-canonical-src="http://i.imgur.com/IOyLj4i.jpg" style="box-sizing: content-box; max-width: 100%;">

I used curl to briefly test why the URL in the src attribute isn't referencing an image. Here's the results:

$ curl -i https://camo.githubusercontent.com/fae27d1291ed38dd120595d692eacd2505cd3a9c/687474703a2f2f692e696d6775722e636f6d2f494f794c6a34692e6a7067
HTTP/1.1 403 Forbidden
{OTHER HEADERS OMITTED}

Bad Signature