Document Smoke Testing Steps

Suggested changes to set up instructions:

- Add link to setting up git for Drupal to the set up instructions. It's not really enough, but it was my pain points getting set up and I feel like I might need the refresher if I were helping someone else.
- https://www.drupal.org/docs/develop/git/setting-up-git-for-drupal/config... → to the set up instructions
- Maybe make a note that you need to say yes to a few prompts after starting ddev start? Might be premature optimization, but I didn't like needing to make an educated guess.
- Maybe make a note that your site login will be generated after the ddev drush site:install -y step?
- Add a note that you need to go to https://crm.ddev.site to see the website after it is set up based on the provided commands, I got a little confused about that.

Thanks @speckles! The current set up instructions are definitely barebones and developer-oriented. Separate from this issue about smoke testing, I'd suggest that you create a new issue "Document installation and configuration for novice users" where you create an issue fork and propose new/updated pages in docs/ as needed.