nvim-lspconfig/lua/lspconfig/configs/basics_ls.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 = { 'basics-language-server' },
    single_file_support = true,
    settings = {
      buffer = {
        enable = true,
        minCompletionLength = 4,
      },
      path = {
        enable = true,
      },
      snippet = {
        enable = false,
        sources = {},
      },
    },
  },
  docs = {
    description = [[
https://github.com/antonk52/basics-language-server/

Buffer, path, and snippet completion

```sh
npm install -g basics-language-server
```
]],
  },
}