added env file for api url

.env.example

@@ -0,0 +1 @@
+REACT_APP_API_URL="localhost:5000"

src/layout/pages/Home.tsx

@@ -3,7 +3,7 @@ import {GHButton} from "../components/Button";
 import {Link} from "react-router-dom";
 import useTitle from "../../utils/TitleHook";
 
-const ROOM_URL = 'http://localhost:5062/room';
+const ROOM_URL = `http://${process.env.REACT_APP_API_URL}/room`;
 
 const Home = () => {
 

src/layout/pages/Room.tsx

@@ -10,7 +10,7 @@ const Room = () => {
 
     const {roomId} = useParams();
 
-    const WS_URL = `ws://localhost:5062/room/${roomId}`;
+    const WS_URL = `ws://${process.env.REACT_APP_API_URL}/room/${roomId}`;
 
     const [message, setMessage] = React.useState<string>('');
     const [messages, setMessages] = React.useState<string[]>([]);