Update server.js

server.js

@@ -8,7 +8,7 @@ const app = express();
 const port = 7860;
 
 app.use("/file", express.static(os.tmpdir()));
-app.use("/", express.static('index.html'));
+app.use("/", express.static(path.join(process.cwd(), 'index.html')));
 
 const storage = multer.diskStorage({
 	destination: (req, file, cb) => cb(null, os.tmpdir()),