I am a fan of the domain of ones own idea, delightfully named by Jim Groom, which is one of the reasons I like this 1999.io. I am also enjoying the thrift & geekiness of hosting this on a Raspberry pi.
I am remembering that the PI's system & stored data is on a fragile SD card, these can be ruined by a careless shutdown and I've got no backup strategy.
I also am reminded that:
If you wish to make an apple pie from scratch, you must first invent the universe.