Git and GitHub
By the end your bio page is a repository with a history that says why at every step, pushed to a public repo under your own account with an SSH key whose private half has never left ~/.ssh; you can run the cycle, change, stage, commit, push, and read git status between every move; you can tell the story of a history and explain any one commit in it; you have fixed a mistake with the history and settled a merge conflict on a throwaway repo; and both your repos carry a tested .gitignore and nothing that never goes in.