batcave
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npm start ...then hava socket.io error
websocket.js:111 WebSocket connection to 'wss://hitesh-batcave.herokuapp.com/socket.io/?EIO=3&transport=websocket&sid=7lHcMhEZmrqW4fxZAAAL' failed: Error during WebSocket handshake: Unexpected response code: 400
Seems all right.