nvim-lspconfig/lua/lspconfig/configs/ungrammar_languageserver.lua

-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-- This config is DEPRECATED.
-- Use the configs in `lsp/` instead (requires Nvim 0.11).
--
-- ALL configs in `lua/lspconfig/configs/` will be DELETED.
-- They exist only to support Nvim 0.10 or older.
-- !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
return {
  default_config = {
    cmd = { 'ungrammar-languageserver', '--stdio' },
    filetypes = { 'ungrammar' },
    root_dir = function(fname)
      return vim.fs.dirname(vim.fs.find('.git', { path = fname, upward = true })[1])
    end,
    single_file_support = true,
    settings = {
      ungrammar = {
        validate = {
          enable = true,
        },
        format = {
          enable = true,
        },
      },
    },
  },
  docs = {
    description = [[
https://github.com/binhtran432k/ungrammar-language-features
Language Server for Ungrammar.

Ungrammar Language Server can be installed via npm:
```sh
npm i ungrammar-languageserver -g
```
    ]],
  },
}