Using https://github.com/mkslanc/ace-linters https://mkslanc.github.io/ace-linters/

Make a websocket server for lsp on port 3000
https://mkslanc.github.io/ace-linters/websocket.html

http://localhost:3000/exampleServer

https://github.com/mkslanc/ace-linters/blob/c1b317e01299016ac7da6588361228637f4eac25/packages/demo/websockets-lsp/server/server.ts

https://www.jsonrpc.org/specification