node.js - Host signalling server on heroku -

i have built signalling server using webrtc, nodejs, web-socket. able run server locally want host server on heroku. o have looked on internet cannot find relevant. how can host server on heroku?

here code

var websocketserver = require('ws').server;  var wss = new websocketserver({port: 9090});  var users = {};  wss.on('connection', function(connection) {    console.log("user connected");    //when server gets message connected user   connection.on('message', function(message) {      var data;      //accepting json messages     try {       data = json.parse(message);     } catch (e) {       console.log("invalid json");       data = {};     }      //switching type of user message     switch (data.type) {       //when user tries login       case "login":       console.log("user logged", data.name);        //if logged in username refuse       if(users[data.name]) {         sendto(connection, {           type: "login",           success: false         });       } else {         //save user connection on server         users[data.name] = connection;         connection.name = data.name;          sendto(connection, {           type: "login",           success: true         });       }        break;        case "offer":       //for ex. usera wants call userb       console.log("sending offer to: ", data.name);        //if userb exists send him offer details       var conn = users[data.name];        if(conn != null) {         //setting usera connected userb         connection.othername = data.name;          sendto(conn, {           type: "offer",           offer: data.offer,           name: connection.name         });       }        break;        case "answer":       console.log("sending answer to: ", data.name);       //for ex. userb answers usera       var conn = users[data.name];        if(conn != null) {         connection.othername = data.name;         sendto(conn, {           type: "answer",           answer: data.answer         });       }        break;        case "candidate":       console.log("sending candidate to:",data.name);       var conn = users[data.name];        if(conn != null) {         sendto(conn, {           type: "candidate",           candidate: data.candidate         });       }        break;        case "leave":       console.log("disconnecting from", data.name);       var conn = users[data.name];       conn.othername = null;        //notify other user can disconnect peer connection       if(conn != null) {         sendto(conn, {           type: "leave"         });       }        break;        default:       sendto(connection, {         type: "error",         message: "command not found: " + data.type       });        break;     }    });    //when user exits, example closes browser window   //this may if still in "offer","answer" or "candidate" state   connection.on("close", function() {      if(connection.name) {       delete users[connection.name];        if(connection.othername) {         console.log("disconnecting ", connection.othername);         var conn = users[connection.othername];         conn.othername = null;          if(conn != null) {           sendto(conn, {             type: "leave"           });         }       }     }    });    connection.send("hello world"); });  function sendto(connection, message) {   connection.send(json.stringify(message)); } 

above code sample of server.js file.

any appreciated?

here is:

step1: push code on github. before pushing make changes in package.json.

package.json important file run server on cloud. start script, dependencies , node version important. in code use process.env.port instead of hard coded port number.

step2: create heroku project through cli. push branch on heroku.

i know pretty brief steps. can more. if able good, otherwise can in detail.