Share players position using Socket.IO

- I stocked information user (id, room and position) in socket client.
 - I created function to send all information every few 10 milliseconds.

Note : when the front will be available, we must check the performance of back server.

back/src/Enum/EnvironmentVariable.ts

@@ -1,5 +1,7 @@
 const SECRET_KEY = process.env.SECRET_KEY || "THECODINGMACHINE_SECRET_KEY";
+const ROOM = process.env.ROOM || "THECODINGMACHINE";
 
 export {
-    SECRET_KEY
+    SECRET_KEY,
+    ROOM
 }