added port

server.js

@@ -3,28 +3,33 @@ const express = require("express");
 const socketio = require("socket.io");
 const router = require("./server/route");
 const app = express();
-const { addUsers, removeUser, getAllUsers, getUser } = require("./server/user");
+const {
+  addUsers,
+  removeUser,
+  getAllUsers,
+  getUser,
+} = require("./server/user");
 
 app.use(router);
 
 const server = http.createServer(app);
 const io = socketio(server);
 
-io.on("connection", socket => {
+io.on("connection", (socket) => {
   socket.on("join", ({ name, room }, callback) => {
     const { error, user } = addUsers({ id: socket.id, name, room });
     if (error) return callback(error);
 
     // message to only the newly joined user
     socket.emit("message", {
       user: "admin",
-      message: ` ${user.name}, welcome to to ${user.room} room`
+      message: ` ${user.name}, welcome to to ${user.room} room`,
     });
 
     // Message to the room except to the newly joined user
     socket.broadcast.to(user.room).emit("message", {
       user: "admin",
-      message: `${user.name} has just join the ${user.room} room`
+      message: `${user.name} has just join the ${user.room} room`,
     });
     socket.join(user.room);
     callback();
@@ -43,13 +48,13 @@ io.on("connection", socket => {
     if (user) {
       io.to(user.room).emit("message", {
         user: "admin",
-        message: `${user.name} has left the ${user.room} room`
+        message: `${user.name} has left the ${user.room} room`,
       });
     }
   });
 });
 
-const PORT = 3001;
-server.listen(PORT, function() {
+const PORT = process.env.PORT || 3001;
+server.listen(PORT, function () {
   console.log(`The server has started on Port ${PORT}`);
 });