Add the GitHub repo as a remote reference for the existing project. Perform a git push operation with the -u and -f switches. Verify that the existing project’s files have been pushed to GitHub. How ...

Source: How we improved push processing on GitHub GitHub revamped its code push process by breaking down the long, sequential job into multiple independent, parallel processes.

A Github repository is basically a folder designed to store files. It is also available online for anyone to download, access, and contribute to the files/code within the folder.

GitHub's secret scanning alerts are available on all public repositories, and its push protection is now offered for custom secret patterns.