gitlab上創建project後，並本地init git project後，嘗試下在第六步push本地project時，若遇到無法push commit至protect branch問題，如 "You are not allowed to force push code to a protected branch on this project."，可通過gitlab project頁面unprotect branch
git init
git add xxx
git commit -m"xxx"
git remote add origin https://gitlab.com/xxx/xxx.git
git branch -M main
git push -uf origin main
unprotect branch方式如下:
1, 選擇settings -> repository
2. 點選欲被push但被protect的branch，後方的unprotect按鈕
3. 點選後即可本地操作重新push，此時應可成功push至原嘗試push的branch
git push -uf origin main
