Answers for "css link before or after bootstrap link"

undo git

# KEEP CHANGES
git reset --soft HEAD~1

# REMOVE CHANGES
git reset --hard HEAD~1

how to revert a git revert

git revert <commitHashOfTheRevert> # locate the hash the revert was done 
                             #this will invert the changes made in that commit
                             #and preserve the git history

bootstrap cdn

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">