Merge pull request 'readme update contribute' (#85) from development_readme into development

Reviewed-on: #85

README.md

@@ -8,6 +8,9 @@
 - [Create a New mdBook](#create-a-new-mdbook)
 - [Use Hero with Docker](#use-hero-with-docker)
 - [Contribute](#contribute)
+  - [Branches and Forks](#branches-and-forks)
+  - [Overview](#overview-1)
+  - [Content Update Procedure](#content-update-procedure)
 
 ## Overview
 
@@ -57,7 +60,29 @@ You can use Hero with Docker. Read the docs [here](https://git.ourworld.tf/tfgri
 
 ## Contribute
 
-To contribute to this repository, make a pull request of your changes. 
+To optimize updates to this repository, we propose a uniform way to collaborate.
+
+### Branches and Forks
+
+To contribute to this repository, make a pull request of your changes. There are two main methods.
 
 1. Fork the repository and make a pull requests with your changes
 2. If you have access, create a new branch in this repo and make a pull request with your changes
+
+### Overview
+
+- The production-ready content is published on the **main** branch
+- The staging content is published on the **development** branch
+- Any changes to development must go through a pull request (PR) and its associated review from a different branch with the prefix `development_`. 
+  - The name of the branch should indicate the work being done, e.g. working on the readme, `development_readme_work`
+- Once staging is done on development, the code owners will merge development branch to main branch.
+  - The mdbooks will be updated online.
+
+### Content Update Procedure
+
+- Create new branch out of development (e.g. `development_work`)
+- Make changes to the files
+- Make a PR to merge to development
+  - Get reviewed and adjust accordingly
+- PR is approved and the content is merged to development
+- Code owners will merge development to main to update the books online