Developer Workflow Docs

[alexfinnarn]

Add docs on Gitflow and addressing how to go from issue creation to deployment.

• Do you write custom code or use open source?
• Does it need a test?
• What do you do if blocked?
• How/who reviews code?

[stale[bot]]

Since y'all haven't touched me in 60 days, I feel unwanted and will close up shop after 7 more days. If you want to keep me alive, add the "pinned" or "security" labels...but don't be cruel. More info found at https://github.com/CUCentralAdvancement/github-docs/blob/main/docs/github/stalebot.md