To run bundle exec jekyll serve

Add stuff to gemfile bundle add bundle install

Generate thumbnails convert -define jpeg:size=200x200 ./images/2021-03-09-construction/construction1.jpg -thumbnail 200x200^ -gravity center -extent 200x200 ./images/2021-03-09-construction/construction1-thumb.jpg convert ./images/2021-03-09-construction/construction3.jpg -resize 400x400 ./images/2021-03-09-construction/construction3-thumb.jpg