Building a Kisok Display for Show Flyers

I have been trying to add more whimsy to my home office lately. In a lot of ways that seems to mean trying to create that seedy nightclub atmosphere that I've always enjoyed. In the aftermath of seeing Wednesday 13 and Lords of Acid on adjacent nights I decided that I should rummage about the hoard of broken toys and see if I could come up with a DNA Lounge-esque flyer display. I took an old TV, Raspberry Pi 3b and whipped up a portrait-mode screen. The installation notes are over in the README that you can find in the flyers folder of my misc.git repository. The HTML, CSS and JavaScript are all contained inline in the webpage. It handles rotation itself because if you ask the Raspberry Pi to rotate the screen it seems to essentially disable GPU acceleration which turns it into an agonizing slideshow. It also handles reloading both the RSS feed of images and itself by doing a HEAD of the various URLs every 10 minutes. There are two levels of watchdog timers, one in the JavaScript that…