README

Making Jekyll run on my M1 Mac:

1. Setting the needed Ruby version via asdf (.tool-version file in root directory) based on the version control approach in https://www.shouvikbasak.net/website/jekyll-on-macos-apple-m1-solved/.
2. bundle update as stated in https://jekyllrb.com/docs/troubleshooting/#macos
3. bundle exec jekyll serve as stated in https://jekyllrb.com/docs/troubleshooting/#macos