Selfie Display and Storage for Events

I require a solution to allow guests at an event to scan a QR Code which allows them to upload a selfie to be displayed on a TV Screen. The incoming spitfires will be played as a slideshow as they come in. The solution must not be connected to the internet and would just run a local Wi-Fi hotspot with a “server” at the end of the even the photos should be able to be easily copied onto a USB Stick