Update: Reddit has fixed their gallery links, so this project is now unneccessary.
I have repurposed embreddit.com to now be an instance of fxtumblr.
Reddit gallery links don't generate embeds when posted on Discord.
Like fxtwitter.com, embreddit.com fixes this.
https://www.reddit.com/gallery/139emh4 => https://embreddit.com/gallery/139emh4