deployment added

Author: priyam-03

frontend/src/realtimeCommunication/socketConnection.js

@@ -19,7 +19,7 @@ export const connectWithSocketServer = (userInfo) => {
   const jwtToken = userInfo.token;
   const connection_url =
     process.env.ENVIRONMENT == "PRODUCTION"
-      ? process.env.BACKEND_URL
+      ? process.env.REACT_APP_BACKEND_URL
       : "http://localhost:4000";
   // Update this URL with your server's local network IP
   socket = io(