Create a new branch (e.g., git checkout -b add_person/<name>)
Add a picture in images/members
Add an entry to _data/students.yml
Check that the site builds/looks ok in a browser locally (instructions below)
Commit and push that to GitHub
Open a Pull Request on GitHub and the webmaster will merge it in
To run locally (not on GitHub Pages, to serve on your own computer)
Clone the repository and made updates as detailed above
Make sure you have ruby-dev, bundler, and nodejs installed: sudo apt install ruby-dev ruby-bundler nodejs
Run bundle clean to clean up the directory (no need to run --force)
Run bundle install to install ruby dependencies. If you get errors, delete Gemfile.lock and try again.
Run bundle exec jekyll serve -l to generate the HTML and serve it from localhost:4000 the local server will automatically rebuild and refresh the pages on change.