Heard about his on the self hosted podcast and just installed it and it works great. Dont use the given compose file just make your own with the linuxserver image. Here's mine and it works over tailscale and through my reverse proxy.

version: "3"
services:
  snapdrop:
    image: "linuxserver/snapdrop"
    
    volumes:
      - /nasdata/docker/volumes/snapdrop/:/data
    
    ports:
      - "8090:80"
      - "4430:443"