I want to push the local branch to GitHub.

While checking out to the feat/knocout branch locally, execute the following command:

$git push-u origin feat/knocout

-u origin is an option that specifies which remote repository to track, and if it is a repository that you manage, it usually specifies origin.This option allows you to skip the next specification (only git push can push).

P.S.
"Knoc kout" is spelled correctly.If you want to modify the branch name, check out to another branch and

$git checkout master
$ git branch-m knocout knockout