1. 코드 // express, socket.io , fs , nodemon const socketio = require("socket.io"); const express = require("express"); const app = express(); const fs = require("fs"); const PORT = 4000; const server = app.listen(PORT, () => { console.log("server start"); }); const io = socketio(server); let daehan = [ [1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 1, 0, 1, 1], [1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1], [1, 1, ..