If you are a user who only wants to code your own bot, then simply head to the snakebot client respository and follow the instructions there. There will be a docker-compose file there to easily get your own server and webclient running as containers without the need to clone them from here.
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A multi player, server based snake game for computer bots as players
Clients connect via a websocket through which events and commands are sent bidirectionally. Following client implementations are up to date: