Update Node.gitignore

I have been using this .gitignore file for many months, although I realized everytime I have to custom add for the config files and in config files every one of your private details is saved, So, I just added it to this file.
Thanks & Regards!

Node.gitignore

@@ -128,3 +128,6 @@ dist
 .yarn/build-state.yml
 .yarn/install-state.gz
 .pnp.*
+
+#config files
+config/