Open Source Release Help

Hello, I'm working on a Node.js server structure to run a lobby & game, along with a multiplayer plugin that integrates with it. So I guess my question is: is there a tutorial or any general tips to consider before releasing the code? I've got my .gitignore set to not push anything sensitive or unnecessary. How the server works It takes players to a lobby page that generates a random 12-digit code you can share with your friends to connect. Then the "host" launches the game, and the other players can connect. Security This does not connect to a DB anywhere, and there is no player login; all save game data is saved locally. So I'm not worried about that type of security. I've got some basics like rate limiting and type matching. Are there any other security measures I should implement to make it less vulnerable to attacks?