Way to publish subfolder on Github Pages

GitHubPages.sh

# Commands to set a subfolder on Github Pages instead ROOT
# Inspired from 
# - https://gist.github.com/cobyism/4730490
# And
# - https://stackoverflow.com/a/36782614/7998119

# Command to publish on Remote
git subtree push --prefix build_folder origin gh-pages
# Command to update the branch after a commit
git push origin `git subtree split --prefix build_folder master`:gh-pages --force
# Where build_folder is the target folder to publish