Git在push推送時，報錯提示信息如下：
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
原因：本地和遠程倉庫代碼不同步，因此需要先pull，進行合並然后再進行push
git pull --rebase origin master
git push -u origin master