This instance currently runs on a server in my appartment in Germany. It is powered by a gigabit connection and has a dynamic IP in connection with a dynamic DNS, which helps to evade Google rate-limiting this instance.
Daily at 4am CET, the router restarts and recieves a new WAN IP. However, it takes some time for the dynamic DNS to keep up.
Soon, a backup instance will be launched on my server in France. That instance will have the same accounts and settings as this one. Create an account here and it will be mirrored in case this instance becomes unavailable!