feat: deploy heroku test app

Procfile

@@ -0,0 +1 @@
+web: python main.py

main.py

@@ -1,13 +1,15 @@
 #!/usr/bin/env python
 
 import asyncio
+import os
+
 import websockets
 
 async def echo(websocket, path):
     async for message in websocket:
         await websocket.send(message)
 
-asyncio.get_event_loop().run_until_complete(
-    websockets.serve(echo, "", 5000))
-print("starting websocket...")
+start_server = websockets.serve(echo, "", int(os.environ["PORT"]))
+
+asyncio.get_event_loop().run_until_complete(start_server)
 asyncio.get_event_loop().run_forever()