nvim keybind for rendering markdown in glow

Some lua I wrote to let me render markdown in glow. It was my first time experimenting with hooking into the neovim APIs and I'm pretty happy with how it turned out. Hopefully it will be useful to someone else as guidance, though I'm sure there are better ways to do this.

local function render_markdown_with_glow()
  local tempfile = vim.fn.tempname() .. ".md"
  vim.cmd("write! " .. tempfile)

  vim.cmd("enew")
  local bufnr = vim.api.nvim_get_current_buf()

  local command = "terminal glow -p " .. tempfile

  vim.cmd(command)

  vim.cmd("startinsert!")

  vim.api.nvim_create_autocmd("TermClose", {
    buffer = bufnr,
    callback = function()
      vim.loop.fs_unlink(tempfile)
      pcall(vim.api.nvim_buf_delete, bufnr, { force = true })
    end,
  })
end

vim.api.nvim_create_autocmd("FileType", {
  pattern = "markdown",
  callback = function()
    vim.keymap.set(
      "n",
      "<leader>md",
      render_markdown_with_glow,
      { silent = true, buffer = true, desc = "render markdown with glow" }
    )
  end,
})