LunarVim/ftplugin/dockerfile.lua

-- npm install -g dockerfile-language-server-nodejs
require("lspconfig").dockerls.setup {
  cmd = { DATA_PATH .. "/lspinstall/dockerfile/node_modules/.bin/docker-langserver", "--stdio" },
  on_attach = require("lsp").common_on_attach,
  root_dir = vim.loop.cwd,
}