Code review guidelines and best practices.

[tylercherpak]

We should add a section of the best practices that talks about how to do proper code review and make suggestions.

Gitlab has a good example of this and potentially we can link directly to it: https://docs.gitlab.com/ee/development/code_review.html#everyone

Big things I would like to see added:

• Understand that all code bases are the combination of many technical trade offs and business decisions
• Be kind
• Remember its the code being reviewed and not you
• Try to be thorough with your review to reduce iterations
• Make sure to let the author know if changes are required
• Ask for clarification if you don't understand something