fix: remove development condition

Author: nayounsang

packages/docs/app/_hooks/useStartMSW.tsx

@@ -5,7 +5,6 @@ export const useStartMSW = () => {
   const flagRef = useRef<boolean>(false);
 
   useEffect(() => {
-    if (process.env.NODE_ENV !== "development") return;
     if (flagRef.current) return;
 
     const initWorker = async () => {