1. create a new repository on the command line
git init
git add README.md
git commit -m "first commit"
git branch -M main
git remote add origin https://github.com/LM917178900/2022.git
git push -u origin main
2. push an existing repository from the command line
git remote add origin https://github.com/LM917178900/2022.git
git branch -M main
git push -u origin main
