test websocket with curl
curl --include --no-buffer -s --http1.1 -H "Upgrade: websocket" -H "Connection: Upgrade" -H "Sec-WebSocket-Key: sN9cRrP/n9NdMgdcy2VJFQ==" -H "Sec-WebSocket-Version: 13" "{http://localhost:8899}"refer to: https://zh.wikipedia.org/zh-tw/WebSocket
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information