Code Studio Warning in Validate Code stage of the pipeline job.

Issue

Warning that occurred in the earlier Validate Code stage of the pipeline job. With the following message in the log:

You have committed files or directories that Acquia recommends gitignoring.
Please do not commit any of the following files or directories:
vendor, node_modules, docroot/composer.json, docroot/libraries, docroot/core, docroot/modules/contrib, docroot/themes/contrib, docroot/profiles/contrib

A lot of these directories are committed in your codebase currently when they should be gitignored so composer can add them during the build for you.

Resolution

To resolve this warning you need to add the recommended folder into your root .gitignore file. We recommend to use the following sample:
https://github.com/acquia/drupal-recommended-project/blob/master/.gitignore
Following the steps to resolve this issue:

• Remove the folders that you are seeing. Ex: 
  copy

  rm -rf vendor docroot/module/contrib

• Add and commit your change via git
• Modify the .gitignore base on the sample: https://github.com/acquia/drupal-recommended-project/blob/master/.gitignore
• Run `composer install` and add/commit your changes.