feat(extras): added extra for nvim-lint

lua/lazyvim/plugins/extras/lang/docker.lua

@@ -25,6 +25,15 @@ return {
       end,
     },
   },
+  {
+    "mfussenegger/nvim-lint",
+    optional = true,
+    opts = {
+      linters_by_ft = {
+        dockerfile = { "hadolint" },
+      },
+    },
+  },
   {
     "neovim/nvim-lspconfig",
     opts = {