This is an example language server to use with zlux-editor.
It uses Microsoft's Python Language Server and proxies it to a socket.
The web service must be ls (set in pluginDefinition.json), and the identifier must have a segment that contains exactly languageserver. It must have at least listeners on the root (/): one for get requests, to send back information about the language server plugin, and another for websockets, to proxy to the language server.
The information is a js object that must include name (what will be shown in the menu), an array of languages, and an optional 'options' object to send any additional options to the language client.