EPIC: uplift current documentation

[AlexSkrypnyk]

https://docs.drevops.com/ has some docs added. We need to fill-in all the missing sections.

• Diagram of build
• Diagram of site install
• CI docs
  • Caching of the database
  • Dind for consistency
  • Parallel runners for tests
  • Deployment regexes and tests for them
  • Setting up CI steps
  • Builder container
  • Build and test artifacts
• Composer.json - features explained
• Drupal
  • Different approach to settings.php - single file + modules VS per-env file + modules etc.
  • More about settings:
    • Environment var definition
    • Global vs per env settings
    • Local settings
    • Include files for modules
  • Inline with drupal-project
  • Explain what each dependency does
  • Asset-manager
  • Explain to commit lock file after installing
  • Min stability
  • Explain platform
  • Theme scaffold:
    • Subtheme
    • Tests
    • Fe compilation
    • Components dir
    • Livereload
    • Sass
    • Grunt
  • Module scaffold
    • Tests
    • Prevent sending emails
    • Enabling contribs for clam, search, redis
• Database
  • Didi vs difi workflows
  • Caching in ci
  • Sanitisation during install
• Test
  • Add allow fail vars
  • Add linting info
• Notifications
• Deployments (Setting up every type of the deployment)
• Explain example names like yoursite etc - maybe a separate section about installer

Additional resources:

https://www.drupalasheville.com/sites/default/files/2020-07/Session%20-%20Taking%20Maximum%20Advantage%20of%20Drupal%20Core%27s%20Composer%20Template.pdf