https://fullstackopen.com/es/#course-contents
https://www.youtube.com/watch?v=YLvT1ELnaX4&list=PLV8x_i1fqBw0Kn_fBIZTa3wS_VZAqddX7&index=3
//create a new repository on the command line:
echo "# fullstackopen" >> README.md
git init
git add README.md
git commit -m "first commit"
git branch -M main
git remote add origin https://github.com/jadcy2k/fullstackopen.git
git push -u origin main
…or push an existing repository from the command line
git remote add origin https://github.com/jadcy2k/fullstackopen.git
git branch -M main
git push -u origin main