nvim_config/plugins/treesitter.lua

return {
  "nvim-treesitter/nvim-treesitter",
  opts = function(_, opts)
    -- add more things to the ensure_installed table protecting against community packs modifying it
    opts.ensure_installed = require("astronvim.utils").list_insert_unique(opts.ensure_installed, {
      "astro",
      "yaml",
      "svelte",
      "dockerfile",
      "json5",
      "markdown"
    })
  end,
}