config.nvim/lua/plugins/lspinstall.lua

local function setup_servers()
  require'lspinstall'.setup()
  local servers = require'lspinstall'.installed_servers()
  for _, server in pairs(servers) do
    require'lspconfig'[server].setup{}
  end
end

setup_servers()

-- Automatically reload after `:LspInstall <server>` so we don't have to restart neovim
require'lspinstall'.post_install_hook = function ()
  setup_servers() -- reload installed servers
  vim.cmd("bufdo e") -- this triggers the FileType autocmd that starts the server
end