add limit

src/main.ts

@@ -7,7 +7,7 @@ import { ConfirmJob } from './jobs/ConfirmJob'
 import { ChainId } from './config/chain'
 const app = express()
 const port = 9900
-app.use(express.json())
+app.use(express.json({ limit: '50mb'}))
 
 app.post('/start', (req, res) => {
   const { phrases, count } = req.body