SnakesSsSs is a simple anonymous board
The project already contains docker-compose file, you just need to add .env to the root and do some config. Example:
POSTGRES_DB=db
POSTGRES_USER=admin
POSTGRES_PASSWORD=qwerty
HOST=12.13.20.2
SnakesSsSs public host is deployed on 147.45.143.202, but it can be shut down any time :)