app.js

const express = require('express');
const app = express();
const http = require("http");
const path = require("path");
const socketio = require("socket.io");
const server = http.createServer(app);
const io = socketio(server);
const port = 3000;

app.set("view engine","ejs");
app.use(express.static(path.join(__dirname, "public")));

io.on("connection", function (socket){
    socket.on("send-location", function (data) {
        io.emit("recieve-location",{id:socket.id, ...data});
    })
    socket.on("disconnect", function () {
        io.emit("user-disconnected", socket.id);
    })
})

app.get("/", function (req, res) {
    res.render("index");
})

server.listen(port);