add deploy to heroku option

Author: aurbano

README.md

@@ -8,4 +8,8 @@ Start the server locally by running
 
 ```
 yarn start:dev
-```
+```
+
+## Deploy
+
+[![Deploy to Heroku](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy?template=https://github.com/socialgorithm/tic-tac-toe/tree/master)

app.json

@@ -0,0 +1,9 @@
+{
+    "name": "Tic Tac Toe Game Server",
+    "description": "Tic Tac Toe Game Server",
+    "repository": "https://github.com/socialgorithm/tic-tac-toe",
+    "logo": "https://socialgorithm.org/assets/avatar.png",
+    "keywords": ["tournament", "game", "socialgorithm"],
+    "image": "heroku/nodejs",
+    "env": {}
+  }

dist/Server.js

@@ -9,7 +9,8 @@ export default class Server {
   private gameServer: GameServer;
 
   constructor(options: ServerOptions) {
-    this.gameServer = new GameServer(this.onConnection, { port: options.port });
+    const port = process.env.PORT ? parseInt( process.env.PORT, 10) : options.port || 5433;
+    this.gameServer = new GameServer(this.onConnection, { port });
   }
 
   private onConnection(bindings: GameBindings) {