To deploy with angular-cli-ghpages use
GIT_SSH_COMMAND='ssh -i ~/.ssh/your_ssh_key' ng deploy --base-href /UiKit/
PUSH
GIT_SSH_COMMAND='ssh -i ~/.ssh/your-ssh-key' git push
Deploy
GIT_SSH_COMMAND='ssh -i ~/.ssh/your-ssh-key' ng deploy --base-href '/UiKit/'