Answers for "how to upload your code to git directory"

git push current project to master

git init
git add .
git commit -m 'First commit'
git remote add origin <remote repository URL>
git push origin master

how to add an existing project to github

# Go into your existing directory and run below commands
cd docker-spring-boot
echo "# docker-spring-boot" >> README.md
git init
git add -A
git commit -m "first commit"
git branch -M master
git remote add origin https://github.com/devopsmaster/docker-spring-boot.git
git push -u origin master