- Add minimum Go version
- Disambiguate Ruby version requirement
- Fix style issues
  - Capitalization for Node, Yarn, etc
  - Remove reference links
  - Remove "please"
- Update Go version reference
- Add an OS note before Debian/Ubuntu-specific info
- Edit out the colloquial "Things went South" phrase as it might not be
  universally understood as meaning that things have broken down.
- Edit Troubleshooting for clarity
- Add minimum required Git version
- Add minimum Node requirements
- Update Go installation code since 1 11 is no longer supported.
  Code taken from gitlab-foss installation md file
- Edit Ruby version note