fix nom de host dans exemple utilisation backend

code/backend_reconaissance/main.py

@@ -2,9 +2,10 @@ import asyncio
 import json
 import websockets
 import random
+import os
 
 class WebsocketServer:
-    def __init__(self,getEffects,port=5000,host="backend") -> None:
+    def __init__(self,getEffects,port=os.getenv("PORT"),host=os.getenv("HOST")) -> None:
         self.host = host
         self.port = port
         self.getEffects = getEffects