If you are overriding a library that is already overridden by a base theme, use the base theme's full path to the file...
Instructions for installing Rocket Chat on Digital Ocean.
Enable twig debugging in your site's services.yml or development.services.yml.
parameters: twig.config: debug: true
This module contains example code for things we often need to do in Drupal.
Drupal.org documentation on content types and fields.
Download free themes from Drupal.org.