how to add upstream code example

Example 1: setting the upstream for a fork github

git remote add upstream https://thehttpslinkgoeshere.git

Example 2: git set upstream

git branch --set-upstream-to <remote-branch>

// example
git branch --set-upstream-to origin feature-branch

// show up which remote branch a local branch is tracking
git branch -vv

// short version to set upstream with very first push
git push -u origin local-branch